This is not really a bug, but still interesting. There is a CSS hack that works for all versions of Internet Explorer, including IE7. You can find out about it here:
http://www.ibloomstudios.com/article7/
Firstly, yes, the UI is horrid - the 'classic menu' actually has to be selected before 'File', 'Edit' options are available. Isn't that a fundamental usability error?
Anyway. Again, technically not a bug, but the zoom feaure increases/decreases most but not all page elements - try it on this page and you'll see what I mean.
As for min-width etc....Aargh indeed.
I can't get http://www.pbs.org/speak/speech/beastly/ to render correctly in IE7; menu panel overlaps other panels obscuriing some info.
Works fine in Firefox, Netscape and Opera.
My CSS menu is completely misrendered. Something is happening with padding or margin that displays fine in IE6, firefox, and the rest.
http://www.sixbulletsmovie.com
It seems that the padding/margin errors are rendered fine if I use a border... Unfortunately this means that if you want two items directly next to each other you must have 2px of border between them.
If I define relative or absolute I have similar but slightly different positioning problems!
Ignore this comment
Well, the UI just doesn't work (the button order breaks several conventions, and it is definitely worse to use than former IE versions).
Though I "tested" some pages yet, I did not document specific bugs - because it's just a Beta, and as already pointed out, there still is a lot to do. In certain cases, IE7 shows quite strange behavior.