I tried creating a new event, set it to be an all-day event, then set it up to repeat every first of the month, never end.
After hitting publish, I get a blank screen. Though the event does seem to get saved.
I tried to repeat the exact steps and had developer tools open to see if the console is a bit more telling. The console spat out an error, albeit only for about 5 seconds. as soon as the blank page loads, the error disappears. Tried a few times, and caught a screenie of the elusive console error
Anyone have any ideas?