Misbehaviour of kuake extension working together with tabbed

[Nick Frolov]

Greetings,

I noticed that terminating a tab in urxvt with tabbed extension leads also to unbinding of kuake hide-and-show key. I looked to source of both and saw that on_destroy hook in kuake simply calls XUngrabKey() and doesn't check that XGrabKey() was called by another instance of extension. My knowledge of perl and urxvt architecture are miserable - I wasn't able to realize how to check existence of other tabs outside of tabbed extension.

Someone with ideas?