Due to showstopper bug #436575 there will be a 3rd Release Candidate for Firefox 3. This bug which affects only Mac users causes Mozilla applications experience unkillable hangs after installing Mac OS X 10.5.3.  Apparently the underlying issue is on Apple’s side, but the Mozilla developers have come out with a work around/patch to fix this issue. Affected Mozilla applications include: Camino Firefox 2.0.0.14 Firefox 3 RC2 Songbird Thunderbird While there will be an RC3 for Windows and Linux builds as well, it is only a version bump, no actual updates will come with RC3. Only Mac builds will have…