I have the following (temporary) page:
It seems like the sidebar is lined up correctly with the body text in Safari and Firefox for Windows, but it's giving a totally different position for Firefox on the MAC.
I'm using margin-top: 108px;
Is there any other way to position this sidebar vertically that would work across all of these browsers?!?
I'm seeing the same as Nathan, a correctly aligned sidebar. I tested in Firefox 3.6.3 and in an old 3.0 version, both on OSX. So probably it has something to do with your Firefox installation: did you tweak any settings? Or maybe you have text zooming enabled to more or less than 100%?
Otherwise, can you post a screenshot?