Firefox version 21. Scrolling still not working properly. Rated 5 out of 5 stars

This is a really good add-on which has worked perfectly for me up till now. I have updated to version 0.26 to try to get it to work but I still can't get the middle wheel to scroll properly. On some pages it doesn't work at all, on some it works satisfactorily, on others it works if one clicks on to the extreme right-hand side of the page and to the left of the scroll bar, then it works. Clicking anywhere else on the page and doesn't.I would appreciate you looking into this matter to see if you can solve the problem. Many thanks.
SOLUTION FOUND.

I found that the scrolling problems I was experiencing was due to some conflict with the ''Smooth Scrolling'' add-on. Updating this add-on to the latest version fixed the problem.Scrolling now working as it should.

This review is for a previous version of the add-on (0.25.1).