Event ID 7043: Could not load type 'Microsoft.SharePoint.Portal.WebControls.TaxonomyPicker'

Problem

Reviewing the Windows Application event log, you come across the following:

Log Name:      Application
Source:        Microsoft-sharePoint Products-Sharepoint Foundation
Date:          [date]
Event IO:      7043
Task category: Web Controls
Level:         Error
Keywords:
User:          [SharePoint service account]
Computer:      [SharePoint host]
Description:   Load control template file /_controltemplates/Taxonomypicker.ascx failed: could not load type 'Microsoft.sharepoint.portal.webControls.Taxonomypicker' from assembly...

The machine on which this event occurred is the host for a newly installed SharePoint 2010 instance.

Solution

1. Temporary solution:
1. Open a folder and browse to: C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\TEMPLATE\CONTROLTEMPLATES\.
2. Open the file TaxonomyPicker.ascx in a text editor.
3. Search for the string: ,
4. Replace it with just a comma and a space: , 
5. Save the file.
6. Reset IIS.
7. Perform these steps on each farm server (except the database).
2. Permanent solution
1. Delete this file from the controls folder (see above).

Notes

• The problem involves a control template that remains in the control template folder but that has been removed from the code base.  I other words, this is a release error by Microsoft.  A temporary solution is to fix a minor typo in this control, as discussed in KB2481844.  However, the error will re-appear after a system restart, even though the typo no longer exists.  The permanent solution is to remove the control completely. 
• Renaming the control simply leads to the new problem of a (renamed) control being loaded for which no code exists in the code base.

References

• Microsoft Knowledgebase article KB2481844.
• Richard Wilson's Blog: SharePoint 2010, Event ID 7043: Could not load type 'Microsoft.SharePoint.Portal.WebControls.TaxonomyPicker'.