It seems to me that when building a Delphi 5 project (don't ask!), if the version info is set to be loaded from the Delphi project file, the fields other than the version number are wiped from the Delphi project file on each build. The workaround is to put them in the FinalBuilder project, which is OK for the small number of D5 projects I have, but I thought it worth mentioning anyway.
Thanks, we will look into this (you have me wondering where my D5 install disk is, been a few years since I looked at it!) .