MacRuby 0.6 is working well for me but I recently started getting the following malloc error while using the custom page size dialog in Page Setup:

MacRuby 0.6 Release(774,0x7fff7045cc20) malloc: reference count underflow for 0x20275e080, break on auto_refcount_underflow_error to debug.
MacRuby 0.6 Release(774,0x7fff7045cc20) malloc: reference count underflow for 0x202644e40, break on auto_refcount_underflow_error to debug.
MacRuby 0.6 Release(774,0x7fff7045cc20) malloc: reference count underflow for 0x20083b6c0, break on auto_refcount_underflow_error to debug.

This bug generally doesn't cause my MacRuby app to crash but it does crash audio and video streaming applications such as iTunes and EyeTV.

Is this a known bug?

Thanks,
Bob Rice