@admin @adesh Please note that I'm getting an error when I try to add a Poll to a topic.

Way to replicate it:

Create a new topic and add a Poll to it.
Edit the topic and make it sticky (without the poll).
Edit the topic again and try to add the Poll.
Result:

Also, if you need an example of how a standard v4.9.4 forum looks like, please have a look at mine.
Do you see something out of the ordinary? (like every closed topic appears on top of other normal topics regardless of the post date!).
Basically a closed topic acts like a sticky one...

Probably this is the change that broke it: http://codologic.com/forum/index.php?u=/topic/12793/sticky-topics-don-t-remain-on-top-of-the-main-page/1#post-24303

We really need a new version, as there are too many bugs...