[snip]

>> Also the post_event behaves different than the old firebird, the
>> never changed mfc (c++) application gets it sometimes, in many cases
>> not. Only the version of firebird is changed.
>
> Post_event was not changed in Firebird 3. Are you sure that your
> customer's applications are loading the correct version of
> fbclient.dll? This question is applicable to your other problems,
> too.

Looks a bit like: http://tracker.firebirdsql.org/browse/CORE-5210



--
With regards,
Thomas Steinmaurer
http://www.upscene.com

Professional Tools and Services for Firebird
FB TraceManager, IB LogManager, Database Health Check, Tuning etc.