Thanks!!! I'll try that out later today.
The one thing i did notice in the addon_fileupload.php code that seemed odd was that it was set to scrollbars=2. Shouldn't it be 1 or 0? Isn't this basically a toggle? No reason to set it to 2, right? Tthe only adverse effect from having it set to "2" was in Opera on the Mac. If the pic was too big for the screen, it doesn't give you a scroll bar! Works properly in all the other browsers I tested. Opera behaves properly if set to scrollbars=1.
Anyway, here's my unoffical, incomplete survey. All browsers are the latest version except for IE on the PC, which is version 6.
IE - popup sizes properly, no resize.
Firefox - popup sizes properly, can resize window.
Safari - scrollbars ALWAYS appear so calculation of popoup window size slightly off, no resize
Firefox - scrollbars ALWAYS appear so calculation of popoup window size slightly off, no resize
Opera - popup sizes properly, no resize.
Camino - popup sizes properly, no resize.
Anybody else want to report their results in browser tests?