Help! Optio 750Z trouble

Hi Everyone,

Not too long I've bought a Pentax Optio 750Z and I am quite happy with it. (After the firmware update 1.01!!!). A few days ago I came across a very strange error.
When shooting a movie at 320x240 resolution, full color, 30 fps, TIMELAPSE = OFF I get a really bizarre behaviour. These settings let you use the digital zoom.

When zooming in and out the speed of the movie sometimes switches into timelapse mode!!!! (I hope I make sense)... for example you'd make a movie of a ticking second hand of a watch. Without the zoom you'd see it move every second. Zooming in all the way still the same only bigger ;-) Then you zoom out and at one position of the zoom the hand would move 5 times in a second or so (time lapsed) until you either zoom in or out. This doesn't make sense whatsoever since setting Timelapse is set to OFF.

This appears to be a problem with these exact settings. All other settings 15fps or 640x480 are ok.

Could somebody with a Pentax 750Z please try this out? Maybe it's just my camera? Or is it a firmware bug? (BTW. I'm using a sandisk ultra II 512 MB)

Thanks a lot.