Car physics issues

I made a small car physics test using wheel colliders which works fine inside the editor but when I export it to flash it acts all weird.

1. The physics time goes insane.
2. The vehicle automatically goes left even when just pressed forward.

These issues doesn't happen in a web player or standalone.

Flash version
Web version

Just press the forward key and you'll notice.

 

I had more or less a similar issue (along with some lags), on a homemade wheelcollider because of the skidmarks. Comment out the skidmark line in your script and give it a try.

 

I just disabled the skid marks and checked. It didn't work though, the time is really fast and the car just goes to the left for no reason.

 

you guys putting physics in fixedupdate?

 

Yes. That's one the first things I tried. funny part is, it works fine in other builds. I mean I understand it's a BETA and this is suppose to happen.

 

Send unity a repro and attach project seems like it would be a bug if you're using fixedupdate