I think it's due to the very dry atmosphere in your dry box... what's your percent humidity? I set my to about 30%... if the atmosphere is very dry, the solvent trapped in the rubber tends to come to the surface, leading to the sticky feeling... and another problem that surfaces is that the glue that sticks the rubber pad to the body will also dry out very quickly leading to the peeling... I've had peeling problems with my 7D but not sticky rubber pad... my 7 is still ok leh... just picked up it the other day when the thread on the 7 appeared... for old time's sake...