I'm using the latest versions of Firebird and IB Objects with Delphi 7
and my app works perfectly in Windows XP.

In earlier versions of Windows it almost works fine. The problem is
that when a user attempts to insert a new record in Windows 98 the
application closes! In Windows 2000 an access violation in ntdll.dll
occurs. Again, no problems when running under XP.

Code in "before insert" executes before the error occurs. What might
cause this?