Toggle sidebar doesn't close with IE9 at certain zoom %.

With zoom 105%, 120%, 130% the toggle sidebar locks when once opened, with IE9(and also at zoom 70%, 80%, 95%, but this seems not so important). It reopens only if I refresh the page. I have tested up to 250%, it works well at other zoom %. (If a bug, it’s of course, very little 🙂
With IE 9 in Compatibility Wiew the toggle sidebar closes well at every zoom %, but the beginning of text at the main menu is corrupted with Compatibility View.
(I use Windows Vista Home Basic sp2).
With thanks to the creator of the nice theme,
Juhan, Estonia