>>Anyone ever see this error when removing a package?
>>
>>error: cannot open Sigmd5 index using db3 - No such file or directory (2)
>>error: cannot open Filemd5s index using db3 - No such file or directory (2) 
>>
>>I saw it for the first time on a box today when doing an apt-get remove.
>>I suspect I'd get the same result doing an rpm -e.  Note, the package
>>did get removed despite the error.
> 
> 
> That's not good, it means that /var/lib/rpm is missing the above mentioned
> files. If there's not a reason for something like this to have happened
> (fsck, manual deletion..) you might check and see if the system has been
> broken into.

I got this upgrading from RH7.2 to 7.3, I would guess it would have 
something to do with the new version of RPM. Wouldn't worry about it too 
much. Might try an 'rpm --rebuilddb' to make sure things are okay.