Hi Pete,
Well, the IE7 browser generally works with ActiveX and Javascript to function properly with all Auctiva's active content pages. I know those experimenting with the IE8 Beta product had some problems. However, setting that browser to work with "IE7 Emulation" was reported to work (and I think one failure was the template selector Save to Listing didn't work).
I use IE7 on Windows XP-Pro, and no problem. I also check and test with Firefox 3, and ditto.
I have also seen occasional problems with Add-ons or security products/settings that can block active content from functioning.
Danno
Edit: Pete, do you have Service Pack 3 installed?