Degradations in Rekordbox 5.7.0

So far everything has worked fine, with version 5.7.0 there are sudden problems.

I had a gig and I was totally off my socks as it suddenly sounded!

Also the display of the waveforms jolts.

In Autoplay mode the sound jolts and makes a strange noise during interruptions.

Sometimes the sound stumbles during normal operation. Often during pre-listening.

I was irritated again and again, because the pieces sounded as if the speed was varying.

Some cue points are not stored.

Up to the previous version everything ran perfectly on my system:
WIN7 Home Premium SP 1, Core i7 3.4 GHz, 16MB Ram, DDJ-RR