We have queries in the pipe regarding Window 10 mobile version, I honestly do not have an answer for that at the moment.
http://forums.terraria.org/index.php?forums/mobile-bug-reports.149/ and/or the 505Games Support link in my signature.
512MB RAM? Is it a 1st-Gen Kindle Fire?
You might be out of luck there. You need Android 4.0.3 compatibility for this version, and according to
this, 1st Gen Kindles only support up to Android 2.3.3
I don't know that for
sure, but the warnings about having < 1GB RAM have been out for a while now.
Capitalization of world/player names does not appear to be fixed in this version, which is mildly annoying, I agree. Another update is in the works, they wanted to get something out now since it had been held up for so long with the cloud save/crashing issues.
Still pending, I do not know whether they've been submitted for certification yet or not. AFAIK, still on track with the estimates in the OP of this thread.