Trouble Entering Text Fields on MacBook
On that same note, is the quick key lock on? Hit vo semicolon to turn that feature on and off.
VO Key lock should always be off, unless you have a specific reason to leave it on. I've used a Mac for two years, and the only time I have had the lock enabled was when I was experimenting with the feature. When it is enabled, every key you press has the VO keys added to it. So, instead of typing an A, your pressing of the A key actually issues VO-a, or "read all". I hope this makes sense.