Hi Adam,
I've closed the case now because I've found an acceptable workaround (only 7 systems affected here):
I've manually deinstalled the old 9.07 client and reinstalled the 9.08 client from the installation share.
It works on both Windows 2008 64bit SP2 and old Windows 2003 32bit without a problem.
Perhaps you do have more luck with your case.
Kind regards
Guido