I'm rather new to the game so I'm using the Beginner script, and leaving the map on Simple. In fact I've left everything at default.
The hangs happen on clicking New Seed, and clicking Untangle a second time to stop the untangling process. Can't quite recall if it happened ever on the initial Untangle when you click to start the process.
And just now it once again hanged on Quit.
No hangs in game yet.
Was I just lucky that it didn't hang once prior to 7.001? Seems..unlikely, as I was generating map seeds and untangling like mad then, even more so than now, just to see what it would do.
Edit:
Some additional info:
It seems that the Quit hang occurs each time I play the game - as opposed to just putter around with settings in the "start screen area." It will hang within the game if I use the Exit to Operating System option, and will hang from the Start screen if I leave a game and go there instead of directly exiting to the Operating System. Just on the odd chance, I disabled all add-ons (VOTM, etc) and it still happens. So it's something clearly a result of a change that was introduced to 7.001 over 7.000.