Last modified: 2009-06-19 08:53:24 UTC
Please override the commafy function in http://svn.wikimedia.org/viewvc/mediawiki/trunk/phase3/languages/classes/LanguagePl.php?view=markup - it should be the same as in the Ukrainian and German versions (e.g. http://svn.wikimedia.org/viewvc/mediawiki/trunk/phase3/languages/classes/LanguageUk.php?view=markup). The Polish typography rules state that one should write "12 345,67", but "1234,56" (http://poradnia.pwn.pl/lista.php?id=8944).
Fixed in r52156, but as opposed to de at least, it also works with decimals (not with negative numbers though).