The display issues are mostly just inconvenient, but this one is more of a problem.  For me it happens in Firefox and Thunderbird (I don't use Opera). Both programs crash as soon as I click OK in a save dialog box.  If it's a very small file it usually still gets saved, but all but the smallest files don't get saved.  I have to use either wget in a shell, or save via the AttachmentExtractor addon in Thunderbird. These and a few other problems make it impossible for me to set up other users on Trinity.  I can use it myself and work around the problems, but I have to keep everyone else on XFCE.