1.6 → 1.7
blocker → high
This is a horribly frustrating leak! It seems like there is some interaction with jsFiddle that prevents the test case from failing (leaking) unless it is loaded from a clean start. If you simply change the version of jQuery and press Run or reload it won't always start leaking.
That said, I don't think this is a blocker. I can seem to reproduce the behavior consistently all the way back to 1.3.2 in IE8 so if there is a leak it has been going on quite a while.
This test case is an extreme so perhaps in normal cases this leak isn't significant enough to cause problems. I walked through the code and it seems to be releasing things properly, but I'll leave it marked high and we can come back to it later.