Shoot, I knew a few would slip through.
The cancel button taking you to the wrong place is an incorrect variable assignment. This will be fixed, and if you're still in the Earth Cave Stair, you'll be warped back to where you're supposed to be.
The lack of research drops was due to a variable name in the wrong place, likely moved when adding something else in. This will be corrected with the next patch.
The Unicode characters are a "bug" with the name entry screen; they're placeholders I didn't get around to replacing yet.
Undergravel is likely an incorrect variable assignment. Gonna look through it and the others and get back to you ASAP.
Enemy 289 is likely one of the new ones that'll be added in 0.3.7-P2.
EDIT 1:
Multi Target listing Defensive twice is likely due to some Elements using Defensive research for both Windup and Delay. I'll adjust that later. Right now, I'm still trying to reproduce the Split Strike 0 research bug. What conditions does it occur under?
EDIT 2:
AHA. Found the problem, the "is research valid" check was looking at the wrong variable. I'll have that fixed up.
EDIT 3:
No, wait, I still haven't found it. Going to keep looking.
EDIT 4:
I was jumping to a label before assigning a variable! I'll make sure THAT is dealt with thoroughly, and then have a bugfix out.