Re: file extensions
Worst thing I had was with Microsoft, with SQL Server.
There was a known bug in one part of the software, that was corrected in the US package, with a small increment in the DLL version number.
Installing the software in Europe using a localized version, I ran in the exact issue corrected in the last US version.
Checking the DLL (localized), I saw at first it was the proper version.
Looking deeper, I discovered it was in fact the previous buggy DLL with an updated version number...
Add to be sent by snail mail a disk with the proper DLL to be installed on the client system, waiting 2 days out of a planned trip of 5 days...