WinXP pro 32bit, SP3, IE 6.0.2900.5512.xpsp.080413-2111. seems to be the same setup over here.

Cann't confirm it. Working in IE (6.0.2900.5512.xpsp.080413-2111IC XP Pro SP3, all patches installed)... Blast.

Cann't believe that this "IC" in the minor revision saves me...
Just tested IE 7.0.6000.16681 (Vista Business, all patches no SP1): OK.

unfortunately I'm going on vacation tomorrow, [...]

Wrong. Luckily you are going on vacation tomorrow.