Changing Styles

I've been playing with the stylesheet today to try and correct the inconsistencies with my pages when viewed in Firefox or Internet Explorer. It seems that the fluid width of the pages was screwing up the look of the gallery pages. It's only the Gallery integrated into MT that is causing the problems. The main weblog pages view equally good on both browsers: the fluid width (percent) works well in Firefox but not in Internet Explorer and the fixed width works best in IE and has thrown out the Gallery in Firefox, though much better than the other way. I don't want a fixed width so I'm looking at if IE then, and designing a specific stylesheet for the gallery pages. It'd driving me nuts. I've been reading for the last 2 hours, and only managed to get everything looking how it was last night. A total wasted 4 hours or so.