Unresponsive script warning in admin theme

Hello, i am using bugherd but it doesn't seem to be as fast as they announced...
I know it would be very hard to debug the problem i'm experiencing and i guess it doesn't depend on this module but on the specific installation i'm working on with lots of plugin and scripts as well..
But i'd like to notice this since it might happen to other developers and could lead to choose to completely stop using bugherd on drupal.
I'm using admin theme/module as the administration theme and every admin page i try to load causes a firefox warning about an unresponsive script.
Firebug tells me it is the bugherd "sidebar" script, at line 27.
Im working in a development evironment so the scripts compression is disabled and there is no caching but it is pretty necessary while you're still working on the website.
I've already said, there's a lot of scripts being loaded in the site i'm working on and i know it would be very hard to find out what is the problem source.
I just wanted to notice this, maybe i'll try to disable bugherd in admin paths, even though it isn't desiderable, otherwise i should totally stop using bugherd.
Thanks,
Da.