Does the garbage collector implementation change between phobos and tango?

[Jason House]

When using gdc, I have severe issues with the garbage collector.  I'm 
contemplating switching to tango, and if it fixes my GC issues, it'll 
definitely be worth it.

I assume that this bug relates to my issues.  The more complex my 
allocation/deallocation gets, the faster the program crashes.
http://d.puremagic.com/issues/show_bug.cgi?id=72