Which OS are you using? I have tested the issue you have reported and it is working OK here (Win7 64bits SP1)
I just created several frames with random brush strokes, then I went to the first frame and clicked it twice in order to select all the frames, then I moved all the package several frames ahead by dragging the first frame, and continue to work normally
Yeah sorry i just realised it happens on camera layer. In your case isn’t there still a keyframe for the camera?
I did that to move all the keyframes and it worked fine but then went on camera layer and move the first camera keyframe and bye bye!
Yes, there is a keyframe on the camera-layer here.
I tried several times to reproduce the bug you mentioned, but it only happened three times, so it was not a constant issue.
Sometimes Pencil crashed when I wanted to close the application right after moving the frame on the camera-layer. Another crash happened after moving fast my pen-tablet across the main canvas right after moving the camera-layer from its standard position. It also happened when I tried to delete one of the two frames created on the camera-layer.
I will try to make a step-by-step for calling this bug.
I wanted to work on time-line myself. More precisely on the loop function. I would like to make it able to stop and start at custom frame number. I think for good animating wee really need to be able to concentrate on details and have the possibility to have small loops the would act a bit like “flipping” for little parts of animation (just a arm unfolding or a leg touching floor.)