When Simutrans start and load the PAK-files, it shown an Image.
I add at the nightly PAKs to the picture automatikly the revisions-nummer of the PAK (since today, 16.04.2010).
So if somebody whant to write a bug report and forget the number of the nightly-PAK, he/she could look there......
Just to inform you ;o)
(Aktual only in PAK64, because the other have no new generation/update ...)
Edit
I see that I need more than one year to implement it:
http://forum.simutrans.com/index.php?topic=1319.0 (http://forum.simutrans.com/index.php?topic=1319.0)