Here are some downsides to browsers
iCab: It makes its own icons for downloading and downloaded files. These icons don't only apply to the files iCab downloaded, but to ALL downloaded files since iCab launched first
OmniWeb: Displays many pages incorrectly
Opera: No favorites right under the URL-field. Those are and should be standards, Opera is the only browser that don't use them
Mozilla: Big bold and ugly, less you wanna theme it thou...
Netscape: Like a Mozilla wannabe, it's half of what Mozilla was 2 months ago
Internet Explorer: Size of new window adjust to fit size of current window...that's just stupid. Also, my experience is that it's THE slowest browser out there
Chimera: Unstable and unreliable, still missing much that Mozilla has like background-loading tabs