[Mono-list] Lockup with callstack on osx (2.10.9)

[Carlo Kok]

I have an ever growing set of threads stuck in this pattern: 
http://pastebin.com/raw.php?i=GgrmkWWU

I checked the mono sources, this seems to be the code:

http://pastebin.com/6kVBXz6U (CHECK_OBJECT)

it gets stuck in. I see no reason 6 threads should be there. I'm using 
Mono.Security which calls delegate.BeginInvoke for it's callbacks. What 
can I do to narrow down what causes this?

Mono/OSX 2.10.9

Carlo Kok