[mythtv] No video in OS X frontend

[Michael Sherman]

OS X 10.4.2 (Tiger), current SVN pull (10pm EDT Thursday).  When  
watching live TV or recordings, I get audio but black for video.   
This is on the console:

2005-07-21 22:12:54.513 mythfrontend[751] CFLog (21): Error loading / 
System/Library/Components/IOQTComponents.component/Contents/MacOS/ 
IOQTComponents:  error code 4, error number 0 (Symbol not found:  
__cg_png_destroy_write_struct
   Referenced from: /System/Library/Frameworks/ 
ApplicationServices.framework/Versions/A/Frameworks/ImageIO.framework/ 
Versions/A/ImageIO
   Expected in: /usr/local/lib/libPng.dylib
)
DecompressSequenceFrameWhen failed


I just upgraded to qt 3.3.4, but it was also happening with 3.3.3.   
Anyone else seeing this?

-Mike