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You install Microsoft Sharepoint 2010 RTM on Windows 2008 R2, you receive the following error message multiple times in the application event log:
Event Type: Error Event Source: SharePoint Foundation Event Category: None Event ID: 7043 Computer: SERVERNAME Description: Load control template file /_controltemplates/TaxonomyPicker.ascx failed: Could not load type 'Microsoft.SharePoint.Portal.WebControls.TaxonomyPicker' from assembly 'Microsoft.SharePoint.Portal, Version=126.96.36.199, Culture=neutral, PublicKeyToken=71e9bce111e9429c'.
The ULS log is created in a code path where all control templates are loaded into the web application. This is a one time process which happens just before showing any UI to the user after an IISReset. The source of the problem looks like a stale control template in the control templates folder while the control itself has been removed from the code base.
This is not causing any issues except for a wrong ULS log message a single time in a web application process life time, the exception is caught and that template file is skipped. This message should be treated as log noise and can be ignored. To change this behavior:
Navigate to /14/TEMPLATE/ControlTemplates/TaxonomyPicker.ascx user control
Open the user control in a text editor and locate the first line
Find the character string , and replace with a comma ‘,’ (without quotes).
Save the user control
load control template TaxonomyPicker