The build number for April 2012 CU is 14.0.6120.5000. Please checkout the two known issues before applying the CU.

• User Profile Synchronisation service must be restarted.
• Search will not index content until SharePoint Products and Technologies Configuration Wizard is run.

Major SharePoint 2010 issues fixed by the April 2012 CU

The numbers in a decomposition tree do not match what is displayed in the scorecard if you use the Year.FirstMonth:Month dimension in PerformancePoint Services for SharePoint Server 2010.  KB Article – http://support.microsoft.com/kb/2598323

A workflow timer job stops running in SharePoint Server 2010 when a content workflow approval job and a configuration job for a timer job are running. KB Article – http://support.microsoft.com/kb/2598140

Assume that you have many peers or direct reports in your organization, and you log on to a SharePoint site and then view the Organization Browser web part for the first time. In this situation, webpages load slowly on the SharePoint site. KB Article – http://support.microsoft.com/kb/2598140

Consider the following scenario:

• You enable Rating Settings on a survey list in SharePoint Server 2010.
• You respond to the survey, you rate your answer to a question in the survey, and then you submit the rating.
• You answer the question again and then rate the new answer.

In this scenario, the rating is not updated. KB Article – http://support.microsoft.com/kb/2598140

When you publish a major version of a webpage in SharePoint Server 2010, check-in comments for the minor version of the webpage are not persisted. KB Article – http://support.microsoft.com/kb/2598140

When you try to remove a group manager or contributor from a site collection by using the Term Store Management Tool, the process fails, and you receive the following error message: The specified user is not a group manager/contributor on this group. Deletion of this user as a group manager/contributor failed. Parameter name: principalName  KB Article – http://support.microsoft.com/kb/2598140

When you move a webpage to a destination site in a site collection, and then you try to find the destination site by using a tree view of the site collection, the tree view loads slowly. KB Article – http://support.microsoft.com/kb/2598140

Consider the following scenario:

• You add a lookup column to a document library that has the document set content type enabled.
• You add the lookup column to a document set and then configure the column as a shared column.
• You upload a Microsoft Office 2010 document to the document set.
• You select a value in the lookup column of the document set.
• You view the properties of the document.

In this scenario, the document does not inherit the value that you selected in the lookup column. KB Article – http://support.microsoft.com/kb/2598140

When you create a site collection that has a managed path, and the managed path starts with the same character sequence as your domain name, the Variations feature does not work in SharePoint Server 2010. KB Article – http://support.microsoft.com/kb/2598140

When you configure a SharePoint site navigation pane to use automatic sorting in descending order, the pages on the SharePoint site are displayed in descending order. However, the navigation pane does not display the correct pages. KB Article – http://support.microsoft.com/kb/2598140

Assume that you are prompted to select an image file by using an asset picker in SharePoint Server 2010. When you select a non-image file, you are not prompted that the file that you selected is invalid. KB Article – http://support.microsoft.com/kb/2598140

A user’s display name on a SharePoint Server 2010 site changes after several hours. KB Article – http://support.microsoft.com/kb/2598140

Assume that you add a content source to crawl Microsoft Exchange public folders in SharePoint Server 2010. When an email message that contains invalid XML characters is in a public folder, the content source does not crawl the email message. KB Article – http://support.microsoft.com/kb/2598140

An error occurs in a document library when you use Windows Internet Explorer to view a file whose file name contains nonbreaking spaces. KB Article – http://support.microsoft.com/kb/2598140

When you upload and enable Microsoft Office Access template files to a SharePoint Server 2010 solution gallery, the solutions are displayed as “Untitled Feature” in the site collection features. KB Article – http://support.microsoft.com/kb/2598327

When you download a snapshot of a file that contains an embedded .bmp file, Excel Calculation Service crashes. KB Article – http://support.microsoft.com/kb/2598141

Consider the following scenario:

• You configure the Incoming Email feature in SharePoint Foundation 2010.
• You configure a web application to use Claims Based Authentication.
• You create a site collection in the web application.
• You create an email distribution group for an existing SharePoint group, and the distribution group is also created in Active Directory Users and Computers.
• You add a user to the SharePoint group.
• You view the distribution group in Active Directory Users and Computers.

In this scenario, the user whom you just added is not displayed in the Active Directory Users and Computers distribution group. KB Article – http://support.microsoft.com/kb/2598304

You select the Enable Asynchronous Update check box and the Show Manual Refresh Button check box in the AJAX Options settings for a document library. Then, you edit the properties of a document in the document library, and you save the changes. In this situation, SharePoint Foundation 2010 prompts you to open the document.  KB Article – http://support.microsoft.com/kb/2598304

You create a document library that contains a folder structure and some columns in a SharePoint site. Then, you save the site as a site template. In this situation, you cannot create a new site by using the site template. KB Article – http://support.microsoft.com/kb/2598304

Consider the following scenario:

• You add a custom column to a document library in Microsoft Windows SharePoint Services 3.0.
• You upgrade Windows SharePoint Services 3.0 to SharePoint Foundation 2010.
• You edit the properties of a document in the document library.

In this scenario, you cannot save the changes to the custom column field in the document property. KB Article – http://support.microsoft.com/kb/2598304

Workflows that are included in a list template are not attached to new lists that are created from the template after Internet Information Services (IIS) is restarted. KB Article – http://support.microsoft.com/kb/2598304

Consider the following scenario:

• You enable the Versioning feature for a SharePoint site.
• You use Microsoft Word to check in a document as a minor version.
  Note: The document was formerly published as a major version in the SharePoint site.
• Another user tries to check out the minor version of the document.

In this scenario, the user is prompted that the document is locked. KB Article – http://support.microsoft.com/kb/2598304

You cannot remove an existing entry from the People Picker control or add a new user entry to the People Picker control in a SharePoint site. KB Article – http://support.microsoft.com/kb/2598304

Consider the following scenario:

• You move a file from one document library to another document library in a SharePoint Foundation 2010 site collection.
• A link on a webpage references the file in the site collection.
• You perform an incremental deployment from the site collection to another site collection.
• You click the link on the webpage that references the file in the site collection.

In this scenario, you receive the following error message: HTTP 404 – File not found. KB Article – http://support.microsoft.com/kb/2598304

Assume that you import a site collection to another site collection as a subsite. When you change a list permission in the subsite, you cannot visit the site collection. Additionally, you receive the following error message: 500 Internal Server Error. KB Article – http://support.microsoft.com/kb/2598304

Consider the following scenario:

• You create an external content type in SharePoint Foundation 2010.
• You upload a document that is not an Office document to a document library.
• You associate the document with the external content type.
• You move the document to another document library.

In this scenario, the document’s external content type data is not copied to the other document library.  KB Article – http://support.microsoft.com/kb/2598304

Assume that the external data source is updated in an external database. When you use the refresh button to update a customer list that contains an external content type column, external data in list items that are stored in folders is not updated. KB Article – http://support.microsoft.com/kb/2598304

Consider the following scenario:

• You create a root site, and then save the root site as a template in SharePoint Foundation 2010.
• You use the template to create a subsite, and you enable the following settings on the “Set up Groups for this Site” page:
  • Visitors to this Site: Create a new group
  • Members of this Site: Create a new group
  • Owners of this Site: Create a new group
• You use the template to create a subsite under the subsite, and you set the sub-subsite to inherit permissions from the subsite.

In this scenario, the associated groups for the sub-subsite are created incorrectly. KB Article – http://support.microsoft.com/kb/2598304

After you delete a website, or you delete a list, or a folder from the Recycle Bin in SharePoint Foundation 2010, the content database size is not reduced as much as expected. Additionally, list item views do not return results as quickly as expected. KB Article – http://support.microsoft.com/kb/2598304

A lookup field that allows for multiple values does not have a horizontal scrollbar, and long text is truncated. KB Article – http://support.microsoft.com/kb/2598304

When an anonymous user visits a SharePoint site through an alternative access mapping URL, the user cannot receive search results from the site. KB Article – http://support.microsoft.com/kb/2598304

Hyperlinks on a Web Part page are broken after you import the page to another SharePoint site.  KB Article – http://support.microsoft.com/kb/2598304

Assume that you add a lookup column to a form in SharePoint Foundation 2010, and then you relate the lookup column to a list that contains more than 20 items. In this situation, the drop-down list in the lookup column is displayed in the wrong position. This issue occurs when you use Internet Explorer 8 or Internet Explorer 9 to view the lookup column.  KB Article – http://support.microsoft.com/kb/2598273

Please note that above mentioned issues are some of the major issues fixed in this CU. I highly recommend to install April 2012 CU if you are experiencing any of the above issues.

Hope the above collection of issues which are fixed in April 2012 CU is helpful to you.

Please checkout the complete article on the MSDN.

Creating a Design for SharePoint 2010 Global Navigation and Search Boxes (Wrox)

SharePoint 2010 DM Presentation

In the coming days I will go through this features in more detail.

Thank You

http://technet.microsoft.com/en-us/library/cc678870.aspx 

Hope I had this info handy few years ago!

-Jag