I have a user that lost their notes.ini file. When I reloaded their email, I received an error that said RRV bucket is corrupt.
This is easy enough to solve. Just take the NOTES.INI off another users machine and put it on floppy. Edit the file with notepad and delete any lines that have anything that is specific to the user who you copied the file from. Put the notes.ini file back on the users machine with the problem. You may be prompted to provide some info...but I am sure you won't have the errors any more.