No, I was working in 4 tabs and was quite certain what was in each tab. I have also since noticed a change in behavior that might or might not be related. When I click on a tab button in V4.28, the "title bar" at the top of the page updates to reflect the file that is being displayed, in Ver4.3 this does not occur, rather it displays the file path/name of the most recently opened file. Something has changed and the behavior is not intuitive//like it was previously. In order to run any particular file, and be certain that is the one that is going to be executed you have to open the file again.

Fish