This one is a quick release just like the previous one that fixes just one thing.
All previous versions had this problem that the urls were not urlencoded so those urls that contained special characters like those with an accent or diacritics were invalid and of course google would show an error on those sitemaps.
Version 0.9 makes escapes those urls so now those of you with such special characters in the urls can finally enjoy this module.
It seems like the modules is getting closer to version 1.0 . If you have any suggestion about some feature you would like in 1.0 or you found some other bug that needs fixed, don't hesitate to let me know about it.