ok, that's what i've found.
1. as it said in changelog,
Anchor links (hash (#) links) are now ignored by the ajax process.
works just fine for links to the same page, but clicking a link with # for another page does not use ajax. So there probably should be a check whether link follows another page or not.
2. plugin shows "Error! There seems to be a problem, please click the link again." instead of showing "404" page. Seems quite logical in some way, but on the other hand sometimes we need to use customized 404-page, so... a tiny problem here ;)