I don't quite think you understood what I linked too... there's a vulnerability in the N900 version of Flash Player 9.0.124 and the N810's 9.0.48.

Here's another that affects not only the forthcoming 9.0.124 but also versions of 10.x - read here

Anyway, those reasons and many more are why I wanted FP10 sooner than later. 9.0.124 won't stop your N900 from getting "device pwned".

This whole Flash 9.4 announcement = 9.0.124 - read here. And it ain't so safe after all.