Twiced, in two tasks when inputting notes in the inspector, while typing the note, OF 4.5 crashed without warning. Nothing lost however.
Sorry for the trouble! That sounds like one of the bugs fixed in the current test builds of OmniFocus 4.5.1, which you’ll find here:
We’d love to know if those test builds fix the issue for you, or you can wait for 4.5.1 to ship (which should happen soon!) and let us know if you’re still seeing this.
Hope this helps!