SCM: Different timestamp for an unchanged file
Accepted answer
What client are you using? In the Eclipse based client, a timestamp only change should be detected and reconciled so there is no pending change. For other clients, you may need to refresh the pending changes to get the pending change to be removed.
Also, depending on the exact issue you are seeing. The following enhancement that was added in RTC 6.0.3 might help:
Provide an option for having the modification dates of the files in a sandbox be the date the file was changed not when it was loaded (83718)