I have this problems to. Since Service Pack 1 for Vista. Before SP1 starting Gallery remote in Windows XP SP2 compatibility mode fixes the problem. Now the image upload hangs. Only the first selected picture is uploaded correctly.
Further there are Problems with Postnuke login since I upgrades php to 5.25 und MySql 5. The error is "Bad set-cookie POSTNUKESID. No login possible, Gallery Applet works. I use Gallery 1.
Would be glad for every hint.
Best regards
Ollie