When I edit some code (must be several chars and waiting a few seconds) and I click on "Verify and Save" or "Save and Upload", the button reacts as getting clicked but the actual action (verify / upload) is not started. Clicking it one more time, everything is works as supposed.
Ok, we are not able to reproduce it unfortunately...
Is your PC brand new? Would it be possibile to have a screencast with the console open whenver you have the chance?
@mamu, we were finally able to reproduce this issue, it happens only on Safari if you are really bothered by it and you want to try Chrome or Firefox. In the meantime we will try to find a way to fix it!
Thanks for your patience!