Well, given the issues I'm having on my PC after updating Flash via Firefox etc. Facebook hanging at around 90% of the page download, Youtube not loading properly (100's of missing thumbnails and some videos not starting until I refresh the page, same in Facebook) and on top of that, if I disable Adblock Plus and allow Flash ads to display my browser suffers a big performance hit. I'm certainly not desperate for Flash 10.x on my N900 at the moment.

And I'm not the only one getting one or more of the above problems.