When setting the browser inentifaction via settings the user agent strings choosen for safari 5 and safari 4 are imposiable. For selecting Safari 5.1 sends:
"Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10_7_3; en_US) AppleWebKit/537.13+ (KHTML, like Gecko) Version/5.1.7 Safari/534.57.2 "
Obvoius fake since there is no PPC version of 10.7 in fact there isn't an i386 version either. Same issue with Safari 4.0 selected. Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10_6_1; en_US) AppleWebKit/531.21.10 (KHTML, like Gecko) Version/4.0.4 Safari/531.21.10
10.6.1 does not exists for PPC, i386 version does exist. Ditto Safari 6.0. I haven't found a site that pays atttention but these user agent codes could be filtered easliy as fakes.
none as yet. Just made minor string changes in the .desktop files. Affects 4.13.x branch as well.