In my game when I change scenes I do the following:
[[CCDirector sharedDirector] replaceScene: [CCTransitionFadeUp transitionWithDuration:1.0f scene:[OpeningScene scene]]];
Messy? Yes, but it worked fine until I needed to change the Projection mode in the CCDirection to 2D, which I did with the following code:
[[CCDirector sharedDirector] setProjection:CCDirectorProjection2D];
This was done for tilemap z ordering stuff in case you are wondering at this point...
But with that change, the transitions between the scene's was also affected. With the FadeUp transition, it would show the new layer under the old one as it fades up, but following the above change, the "new layer" is now just the black screen, and once the transition finishes, the new scene just appears (jumps from completely black screen to screen with scene instantly).
Do the transitions require a specific projection or am I doing something wrong? I'm kinda at a loss...