I am on 3g, so connection might be a little sporadic, you may want to do a thing like on openledger, where it shows connected, or not connected status with a list of api providers. Steemit is working correctly in browser though.
Nope, no errors, but here is some more info.

At first I tried Advanced and only using the posting key. It crashed, so I tried posting + active, and finally, I gave in and used the main key. Crashes on all attempts, I've tried maybe 7 times.
Unfortunately, no further info to help reproducing it.
Oh, since 3g thing was helpful, I usually have 3-4 bars on antenna.