Immediately after downloading and expanding 2.15.31 in the version appropriate for my Macintosh (10.7.3 Intel Duo) I got a crash reflected in my console with these message:
3/3/12 9:52:59.193 AM [0x0-0x916916].org.lilypond.lilypond: Traceback (most recent call last):
3/3/12 9:52:59.193 AM [0x0-0x916916].org.lilypond.lilypond: File "/Users/ericschissel/donotbackup/chromedownloads/LilyPond 3.app/Contents/Resources/__boot__.py", line 31, in <module>
3/3/12 9:52:59.193 AM [0x0-0x916916].org.lilypond.lilypond: _run('LilyPond.py')
3/3/12 9:52:59.193 AM [0x0-0x916916].org.lilypond.lilypond: File "/Users/ericschissel/donotbackup/chromedownloads/LilyPond 3.app/Contents/Resources/__boot__.py", line 28, in _run
3/3/12 9:52:59.193 AM [0x0-0x916916].org.lilypond.lilypond: execfile(path, globals(), globals())
3/3/12 9:52:59.193 AM [0x0-0x916916].org.lilypond.lilypond: File "/Users/ericschissel/donotbackup/chromedownloads/LilyPond 3.app/Contents/Resources/LilyPond.py", line 3, in <module>
3/3/12 9:52:59.193 AM [0x0-0x916916].org.lilypond.lilypond: from PyObjCTools import AppHelper
3/3/12 9:52:59.193 AM [0x0-0x916916].org.lilypond.lilypond: File "PyObjCTools/AppHelper.pyc", line 14, in <module>
3/3/12 9:52:59.193 AM [0x0-0x916916].org.lilypond.lilypond: File "AppKit/__init__.pyc", line 8, in <module>
3/3/12 9:52:59.193 AM [0x0-0x916916].org.lilypond.lilypond: File "objc/__init__.pyc", line 22, in <module>
3/3/12 9:52:59.193 AM [0x0-0x916916].org.lilypond.lilypond: File "objc/__init__.pyc", line 19, in _update
3/3/12 9:52:59.193 AM [0x0-0x916916].org.lilypond.lilypond: File "objc/_objc.pyc", line 18, in <module>
3/3/12 9:52:59.193 AM [0x0-0x916916].org.lilypond.lilypond: File "objc/_objc.pyc", line 11, in __load
3/3/12 9:52:59.193 AM [0x0-0x916916].org.lilypond.lilypond: ImportError: dlopen(/Users/ericschissel/donotbackup/chromedownloads/LilyPond 3.app/Contents/Resources/lib/python2.6/lib-dynload/objc/_objc.so, 2): Symbol not found: _objc_sync_notify
3/3/12 9:52:59.193 AM [0x0-0x916916].org.lilypond.lilypond: Referenced from: /Users/ericschissel/donotbackup/chromedownloads/LilyPond 3.app/Contents/Resources/lib/python2.6/lib-dynload/objc/_objc.so
3/3/12 9:52:59.193 AM [0x0-0x916916].org.lilypond.lilypond: Expected in: /usr/lib/libobjc.A.dylib
3/3/12 9:52:59.392 AM LilyPond: LilyPond Error
3/3/12 9:52:59.393 AM LilyPond: LilyPond Error
An unexpected error has occurred during execution of the main script
ImportError: dlopen(/Users/ericschissel/donotbackup/chromedownloads/LilyPond 3.app/Contents/Resources/lib/python2.6/lib-dynload/objc/_objc.so, 2): Symbol not found: _objc_sync_notify
Referenced from: /Users/ericschissel/donotbackup/chromedownloads/LilyPond 3.app/Contents/Resources/lib/python2.6/lib-dynload/objc/_objc.so
Expected in: /usr/lib/libobjc.A.dylib
3/3/12 9:53:28.736 AM com.apple.launchd.peruser.501: ([0x0-0x916916].org.lilypond.lilypond[24955]) Exited with code: 255
3/3/12 9:54:39.134 AM LilyPond: The Info.plist file must have a PyRuntimeLocations array containing string values for preferred Python runtime locations. These strings should be "otool -L" style mach ids; "@executable_stub" and "~" prefixes will be translated accordingly.
3/3/12 9:55:05.153 AM [0x0-0x91b91b].LilyPond: 0x9a66212b
3/3/12 9:55:05.153 AM com.apple.launchd.peruser.501: ([0x0-0x91b91b].LilyPond[24997]) Exited with code: 255
Apologies for the dump but not sure what to do with that! Seemed to deserve a report somewhere - if not here, again apologies, will forward to if and as I can.