Hi - I'm a ways along in creating a Drupal site (www.mediafreeforall.com). Most of what I've done has been on a Mac using several browsers as I check and build the site. (Drupal 4.6) I love Drupal, so I'm not going to let this hold me back...
I'm close to being finished with setup for awhile and during my final checks I noticed...
In Internet Explorer (Mac), when editing a piece of content (logged in is as superuser or any account with the right privileges) the whole area of "Author information", including all the checkboxes for 'promote,' 'publish,' etc, are completely missing, but I can see that I'm correctly logged in, and if I check the source html, all the references to checkboxes and author info, promote, etc are present. If you visit the site, you can create a basic account, which would allow you to add a poll or forum topic or something, and you'll notice that you can't access the boxes for 'promote to front page' or various other options on the new item - same if you try to edit an existing item.
Haven't tried on IE for PC yet, but other browsers, Safari, Firefox, Mozilla, etc seem to work just great for the whole site. I have some contributors lined up, but I don't want to let everybody get going on the site until this is fixed. Damn Internet Explorer, it doesn't even show this Drupal.org site correctly. This is going to drive me nuts if I have to support multiple users asking me why they can't promote, publish (or not), etc. I would love to tell all levels of users to use something other than IE, but some of my expected user's will be somewhat less than computer savvy, and I'd just like it to work for IE as is.