Ok, the answer to the frames problem lies in our usage of an add-on domain. Support tells me that by using that feature, the hompage is thrown into a frame. I'm not sure why this doesn't happen in FireFox.
Hmm... It should only be a page on a different site/domain that is referenced from the original frame that would do this - it shouldn't happen within the single domain in which we are operating the forum, unless...
EDIT: I spoke too soon. We should still be able to use the ".info" domain as it is set up. I happened to stumble upon another setting the was utilising the frame forwarding, and I believe that that was the cause of the problem. It's working fine here now. Let me know what you all are experiencing.
This makes a
lot more sense as an explanation. Obviously you can
choose to refer sub-pages as being within a frame if you want, but there shouldn't be any absolute requirement to do so. So if we turn off the frame forwarding, does everybody get an acceptable result?