Apparent Freezing at End of Setup - Fix
Have seen a few posts along these lines, and also during testing. Am fairly sure that the issue is only UI:
1. During First Boot, there is a mythdora screen that has a button "configure myth" or similar. I recall it suggesting that "Finish" should be selected when done. The button then launches a browser....
2. After making mythtv font/back model, lirc, samba etc selections, and then choosing "process selections", a summary screen is presented and it appears all done.
3. Due to the UI themes, the "Finish" button is visible to the bottom right and selecting it just changes the window focus from the browser to the first boot script.
4. It has then appeared to freeze, as the Finish button doesn't activate until the the child browser process has exited.
Fix: use ALT-TAB on the keyboard to switch back to the browser, and then close (X) the browser. Finish button is then activated/selectable and all is well.