Doesn't seem to work on localised Windows XP ? Rated 4 out of 5 stars

I'm a long time Thunderbird and Lightning (formerly: Sunbird) user, but when Thunderbird upgraded from version 8 to version 9, suddenly Lightning version 1.0 didn't work at all anymore...
Then I upgraded Lightning from version 1.0 to 1.1 and it showed up but doesn't work correctly because it justs shows an empty calendar where I can't create any new alarm, let alone a new calendar...

In Thunderbird's settings in the tab "Lightning" there's the selection box "Timezone" but I can't select anything there because it's just an empty field. This seems to be an error, related to what the Russian Ubuntu user reported here some time ago, but I don't know what it is.

How can I solve this serious problem, because for now I've to stick with an outdated Thunderbird 8 (dangerous) because of Lightning 1.1 not working on my German Windows XP SP 3... ?
Any help much appreciated! Thanks.

This review is for a previous version of the add-on (1.1). 

A fix for Windows XP users is underway and already in the review queue! This happens due to an underlying change in the mozilla platform we didn't notice.