I tried to scroll at file:/// and about:crashes and about:config pages, but that doesn't seem to work in Fennec native. Instead, text gets selected. For about:support, I can scroll (except that page seems to stop at the Graphics section for some reason).
This has been fixed, probably by this changeset: http://hg.mozilla.org/projects/birch/rev/eaf778e88070 "Bug 695448 - Implement a Java compositor, and use it to scroll. r=?"
Build ID: Mozilla/5.0 (Android; Linux armv7l; rv:11.0a1) Gecko/20111121 Firefox/11.0a1 Fennec/11.0a1 - Native build Device: HTC Desire Z OS: Android 2.3 Verified on file:/// and about:crashes and about:config pages, scroll worked well, text did not get selected. Marking as verified fixed.