I dont know what are you try to do and where.I am ed a Live guitar with no problem in Style View and work perfect.
Please wxplain what is your trouble in detail.
Dusan,
I have the same issue in an Audya4. Take in account that in my case only happen when trying to EDIT a non Ketron style.
A soon I hit EDIT in the third party style, I get a warning that read "+++Corrupted Style" and the style is no useful any more.
So far is the ONLY bug that I have found in 4.2a.