Video clip jerking in PAL but not in NTSC

[drachmad Profile Private message]

I am a newbie in ProShow Producer (still in demo version) but I have an experience that may be useful for others.
For photo usually there is no problem but sometimes it is not focus - not solved yet.
But when making a slideshow involving video clip:
Although it is ok when creating the slide show in NTSC, it does not mean it will be ok when creating in PAL. The sound in the result is delayed a little bit and the pictures a little bit jerking, sometimes there is a very short blink in between.
After trial and error, it seem the video editor and the file format of video clip when it is saved play an important role.
As a stand alone, the video clip is fine.