I'm up to 4 bugfixes so far, of different seriousnesses:

0.96a   FIXED - New z-ordering code did not work correctly on PHP4. This broke (at least) the editor. (thanks toe_cutter)
        FIXED - \n is no longer treated as a newline in TARGETs (thanks NetAdmin)
        FIXED - KILO was broken completely between 0.95b and 0.96 (thanks Jethro Binks)
        FIXED - Link comments in certain positions could cause div-by-zero errors. (thanks again Jethro)

I have one other outstanding one about USEICONSCALE to investigate still.
Fetching Weathermap.class.php and WeatherMapLink.class.php from the svn repository is enough to get the bugfixes. There will be a 0.96a zipfile once people stop reporting new things!
Those were all actually fun bugs to find, as far as debugging is ever fun...