Align to Grid locks me into the set dimensions pop-up

Last few times I've tried to align to grid it'll do its job but then I'm perpetually stuck in the set dimensions pop-up box. None of the buttons make it go away, hitting the X at the top right of the pop-up doesn't make it go away, clicking on anything at all makes the screen gray out more and more. Refreshing the entire page seems to be the only way to get out of it.

I too am having this issue.  The only workaround I have is everytime I set them the first time, I just go up and hit the reload page button in the browser, annoying but workable.  

It looks like most folks are reporting on this thread . I've done what I can to direct attention there.