Hello,
indeed there might be a problem when having another version of Qt installed for 
own development.
http://sourceforge.net/projects/stellarium/forums/forum/278769/topic/3394879


http://qt.nokia.com/developer/task-tracker/index_html?method=entry&id=197601
Quote:
"This is a deplyment issue. When creating app bundles that contains a copy of 
the Qt frameworks it's important that plugins from the Qt installation are not 
loaded. One way of doing this is overriding library path setting in 
MyApp.app/Contents/Resources/qt.conf"

jus

On 3 Jan 2010, at 17:26, Albert Santoni wrote:

> Hey jus,
> 
> Yeah, that looks like the same problem. It looks like sometime in
> December I changed some code that previously "setLibraryPaths()" and
> made it "addLibraryPath(plugins dir)" instead. If setLibraryPaths()
> was clearing the list of paths to search, I think that would have been
> doing the same thing as putting an empty qt.conf file in your
> Resources directory.
> 
> The reason the three of us could be having problems with these builds
> might then be because Mixxx was somehow trying to load the system's Qt
> plugins instead of the bundle's plugins. This doesn't explain why it
> magically works on the second try for Brian though.
> 
> Brian: Thanks for the QuickTime patch, I've applied it in the 1.7
> branch. When you get a chance, bzr update and please try building the
> OS X package again. If the setLibraryPath() fix didn't work, then I
> guess we can try the qt.conf thing...
> 
> You can also try uncommenting the logging code if you're feeling adventurous. 
> :)
> 
> Thanks,
> Albert
> 
> 
> On Sat, Jan 2, 2010 at 7:07 PM, [email protected] <[email protected]> wrote:
>> Hello,
>> may the "moveToThread" error referring
>> to https://answers.launchpad.net/mixxx/+question/92851 ?
>> http://downloads.mixxx.org/mixxx-1.7.2/mixxx-1.7.2-osx-universal.dmg worked
>> for me after using the blank qt.conf file as described in the link above.
>> 
>> jus
>> 
>> 
>> 
>> On 30 Dec 2009, at 22:01, Albert Santoni wrote:
>> 
>> Hi Brian,
>> 
>> I've attached a patch that disables console output and logging. Please
>> apply it when you get a chance and we'll see if it clears up the
>> moveToThread() problems.
>> 
>> For anyone interested, we're having a problem where the OS X package
>> deadlocks on startup with errors like:
>> Warning: [Main]: QObject::moveToThread: Current thread (0x1ccfb30) is
>> not the object's thread (0x1c0a9f0)
>> 
>> I recently "fixed" a race condition in the message handler callback
>> that definitely caused a crash before, but since it's the only
>> threading-related change that I know of in 1.7.2, it's worth just
>> commenting everything out and seeing if it fixes it.
>> 
>> Thanks,
>> Albert
>> 
>> 
>> On Mon, Dec 28, 2009 at 5:29 AM, Brian Jackson <[email protected]> wrote:
>> 
>> I've got the 1.7.2 package done.
>> 
>> http://theiggy.com/tmp/Mixxx-1.7.2.zip
>> 
>> I think someone wanted me to bundle more stuff in the package. Let me
>> 
>> know what files that was and I'll update that package.
>> 
>> It doesn't have m4a support, but I think that wasn't suggested on 1.7
>> 
>> anyways.
>> 
>> I ran into an issue when building. I made my boot disk case-sensitive.
>> 
>> There is an error in src/SConscript that made it not build. Quicktime
>> 
>> should be QuickTime.
>> 
>> 
>> 
>> === modified file 'mixxx/src/SConscript'
>> 
>> --- mixxx/src/SConscript        2009-12-21 20:28:19 +0000
>> 
>> +++ mixxx/src/SConscript        2009-12-28 00:50:18 +0000
>> 
>> @@ -647,7 +647,7 @@
>> 
>>                 print 'Did not find CoreMIDI framework, exiting!
>> 
>> (Please install it)'
>> 
>>                 Exit(1)
>> 
>>         else:
>> 
>> -               env.Append(LINKFLAGS = '-framework CoreMIDI -framework
>> 
>> CoreFoundation -framework CoreAudio -framework Carbon -framework
>> 
>> Quicktime -framework AudioToolbox -framework AudioUnit') #Have to add
>> 
>> the rest of these frameworks somewhere..
>> 
>> +               env.Append(LINKFLAGS = '-framework CoreMIDI -framework
>> 
>> CoreFoundation -framework CoreAudio -framework Carbon -framework
>> 
>> QuickTime -framework AudioToolbox -framework AudioUnit') #Have to add
>> 
>> the rest of these frameworks somewhere..
>> 
>> 
>> 
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