Just before today's update I tried to crash the Canyon editor by doing the same thing as I mentioned in my last post about the Stadium editor. But how hard I tried, the Canyon editor didn't crash. Even on a large track, after a lot of copying, cutting and pasting and finally selecting the entire map => cut, nothing went wrong.
However...
Just tried the same trick I did last week in the Stadium editor after today's update and... I'm sorry... CTD...
Btw, is there a new version of ManiaPlanet_Logs.exe, because when I use the one dated 10-04-13, ManiaPlanet.exe comes with today's update afterwards, over and over again...
Edit: I made a remake of Stadium A15, but only the track, nothing else. Then I tried to create a dirt area (lower left, first option), filling the entire statium. But as soon as I released my mouse button, I was staring at my desktop again.
When I returned to the editor I did some tests with track parts and this mud area, but it all went well. Even when filling the entire stadium with it. So now I have to find out which part in A15 caused this crash...
CORRECTION: In my A15 remake there were some other blocks too, so not only basic track blocks. But the blocks that caused the crash are explained in my next post... Sorry...

After I removed these blocks (range 7-7-x), I was able to create a mud area beneath the track, filling the entire stadium without any problems.