I replaced my last one without researching the issue (just put it down to wear) but when my relatively new one developed the same problem I figured I'd Google it. OK so not strictly Sonar related, but we all (or most of us anyway) use mice to operate our DAW's and the erroneous double click issue with Logitech mice can drive you stark raving mad when you're working on a project. Does your wireless Logitech mouse sometimes register double clicks when you click once?