Could you try on http://www.cio-online.com/videos/lir...tiens-274.html? I had the problem on this URL (and on YouTube too). With this page (which contains 4 Flash objects), the second Flash object appeared below its container and wasn't blocked (this one isn't an ad, but this is a bug anyway). Note that I have no problem with Firefox + Flashblock on my Linux laptop. BTW, I wonder if the Flashblock port for MicroB is too old: it was announced in January while the latest Flashblock version for Firefox was released on May 16.

Also, all the components I installed have disappeared again!

EDIT: I eventually reported a bug: https://bugs.maemo.org/show_bug.cgi?id=3471