I can confirm this. If I leave my mouse still after launching, I don't get the problem.

Can anyone reproduce this? It's a continuous blockage in my Blender workflow. I guess we don't have that many OSX developers. Unfortunately I don't have another OSX system to check this on.

Interestingly, after a reboot of my Mac, the behavior happens less frequently (roughly 15% of the time, rather than 90% of the time as before).

Here are two logs from running with --debug-events, where the problem was reproduced.

That's correct, I can't reproduce on Linux either.

Confirmed fixed in 1dddcfb. Thanks Antony!

version 2.72 (sub 0), branch b'master', commit date b'2014-10-21' b'11:38', hash b'9e963ae', b'Release'
build date: b'2014-10-23', b'09:26:33'
platform: b'Linux:64bit'
binary path: '/home5/ganders1/blender-2.72b/blender'
build cflags: b'-DWITH_FREESTYLE -pipe -fPIC -funsigned-char -fno-strict-aliasing -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE -fopenmp -DNDEBUG -O2 -msse -msse2 -DWITH_MOD_FLUID -DWITH_MOD_OCEANSIM -DLITTLE_ENDIAN -DWITH_AUDASPACE -DWITH_AVI -DWITH_OPENNL -DHAVE_STDBOOL_H'
build cxxflags: b'-pipe -fPIC -funsigned-char -fno-strict-aliasing -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE -fopenmp -fpermissive -DSTDC_CONSTANT_MACROS -DNDEBUG -O2 -msse -msse2 -DWITH_MOD_FLUID -DWITH_MOD_OCEANSIM -DLITTLE_ENDIAN__ -DWITH_AUDASPACE -DWITH_AVI -DWITH_OPENNL -DHAVE_STDBOOL_H'
build linkflags: b'-lrt'
build system: b'SCons'

That's fine, but is there somewhere I can get information on what changed about the OpenGL requirements between 2.72 and 2.73?

It works properly with blender-softwaregl.

Single precision bites again...That's been a perpetual headache for using (otherwise stellar) Blender my work.

I can't reproduce the bug, so I guess we can close this.

Hmm. I am not seeing it anymore at home. The only difference is that at work I have a second monitor. I won't be able to test that until Tuesday, when I go back to work. I was seeing it extremely consistently before, so let's not close this until I have a chance to try to narrow it down further.

I made the same request in T35123, but it was closed as being a "To-Do":