problems starting from FF19 Rated 4 out of 5 stars

Hi! Great addon (I only use groups feature - and it's awesome!)But starting from FF19 there are some glitches, namely:when moving tab to another group, empty space appears at old position, and it behaves rather strangely. The only way to fix is moving some tabs in the current group until it settles. Would be nice to have new supporter for this plugin!:)

PS Well. Appears it was the problem of TabMixPlus (at least their combination with this plugin). I've disabled "immediate tab move" in TMP and empty space do not appear in the current group. But target group is a mess, with tabs on each other.