I know with Chrome Canary, doing a 2 finger "tip-tap" works natively, pretty much exactly like TouchMe. Sounds like with both TouchMe and Chrome responding the same way to a tip-tap, TouchMe might be sending the control command while Chrome itself is also switching tabs, causing this problem.
You can probably disable this feature in chrome://flags but personally I disabled TouchMe's version of 2 finger tip-tap and use Chrome's exclusively. Chrome Canary also now supports an iPad-like gesture navigation by horizontal overscroll. Very slick.
Interesting. So Chrome is now using TouchMe features eh? I should talk to Google... =]