Search doesn't work after running SharePoint processing wizard (4255685)

Search in SharePoint does not work after running SharePoint Proccessing Wizard to process the server. Error message in the crawl log after the processingof migrated users: Error in the Site Data Web Service

Migration Manager is using the same API as Microsofts stsadm.exe utility that can be used to migrate users. There is a known issue with this API described in the following Microsoft article:
http://support.microsoft.com/kb/941422

To resolve the problem, download and install the update pack wss-kb941422-fullfile-x86-glb.exe from the link above

Also check the following link for additional procedures after installing the upgrade :

http://social.technet.microsoft.com/Forums/en-US/sharepointadmin/thread/556d0e5d-bd1f-4478-acfc-9a2c9ef873cc/

You can use the following stsadm commands to finalize the solution against any remaining site collections that still display the Error:

1. stsadm -o export -url <URL to be exported> -filename <export file name> -versions 2
2. Delete the site collection. Then, run a import using the following command:
3. stsadm -o import -url <URL to be Imported> -filename <import file name> -updateversions 2 -nofilecompression

Note: Do not use the command switch -includeusersecurity. Some customers, rightfully so, will use this by default when doing a export/import. However, in this instance, when issuing the -includeusersecurity switch, you are effectively bringing the short user SIDs back over into the site collection. When doing so, after issuing a full crawl, you will note that the error will still appear in the crawl logs.