[Inkscape-devel] help needed to fix a windows-only bug

I would be grateful to anyone who can debug on Windows for any help with this critical bug:

https://bugs.launchpad.net/inkscape/+bug/169011

I don't develop on Windows and I have no time to set it all up right now, but the bug seems somewhere in the style code which I know well, so if someone can tell me at least approximately where or when the unsetting happens I will probably be able to guess how to fix it.

Thanks!