Comment 12 for bug 30857

that makes sense about the unconfigured trackpad still working. i think its apple desktop bus (adb) rather than ps2, it works through /dev/psaux.

when dragging slowly there is a resonable threshold. its just a quick click while the mouse is moving that causes the drag to stay dragged once the mouse has been released.

in terms of versions firefox and thunderbird in breezy do this also. in thunderbird if you try and click a mail box while the mouse is moving you can often end up moving the mailbox into another mail box which is quite a pain.