In Cpanel, it resizes the window automatically for me (which I find extremely annoying).

In Safari, when logged into Cpanel (and with the password set to autosave) occasionally it makes me log in again when I access the Analog stats (and even more specifically, usually when loading the little red bars).

Also in Safari, the webalizer graphs sometimes refuse to load on the summary page (leaving only the table with numbers) and when this happens the links to the monthly stats refuse to load at all.

When trying to turn off indexing in the index manager I sometimes get an error that "The server was not able to find the document (./frontend/iconic/indexmanager/deluser.html) you requested".  (In fact this always happens when using Safari.)

Now, some of this might be because Safari is a beta browser, but what I've found is the more likely scenario (when using other sites and the ones I create) is that Safari is less tolerant of code errors, and something is ticking it off so it refuses to work.  I would guess the same is happening with other browsers as well.