Seeing errors in your SharePoint trace log? Search the registry fruitlesslessly? Do a search of the XML files in this directory next:
C:Program FilesCommon FilesMicrosoft Sharedweb server extensions12TEMPLATEFEATURES
Sharepoint uploads timing out?
Add an execution timeout value for the upload.aspx page in the main web.config file.
Location of SharePoint's main web.config file
C:Program FilesCommon FilesMicrosoft Sharedweb server extensions12TEMPLATELAYOUTS