I was just thinking about what the 10bii+ would be like as a re-purposed RPN calculator and playing around with it when I found a trig bug. Try this in degrees mode:

270

SIN

(you'll correctly get -1.00)

270

TAN

(you'll see OFLO flash and get correctly get -1.00E500)

270

COS

(you'll correctly get 0.00)

270

TAN

(you'll see OFLO flash and get 1.00E500 -- the bug)

This is in version 7-13-2010. I hope that this is the only bug, I use the 10bii+ a bunch and find it to be a really nice (if non-RPN) machine.

-Katie

p.s. There's still a yet-to-be-found Easter Egg in there.

*Edited: 5 July 2011, 10:51 p.m. *