I am not sure if this is the same issue you are reporting, but I have also seen CuteSoft 6.0 add the ="true" but it is hard for me to reproduce to report the issue.  All I can say is I have seen CuteSoft put this in some of my HTML...

 

selected="true"="true"="true"="true"="true"="true"="true"="true"="true"="true" 

 

Jason