Er.. yah, the subject explains it.
Not sure if this is REALLY a bug, but it seems if someone wanted to make something stick like that, they could make an alias for it.
I only have Linux, so I'm not sure if this happens on other platforms.

Hm, we explicitly just fixed this in 1.0.10, so the keyboard menu should not be binding the shift key.
I guess we'll have to look at it again.

I may not have been clear, what I mean is that it binds just fine, I can bind ! or # or T or w/e I want in the config menu.

Here's an example of the problem:
Bind Turbo to G; flying around then turbo with G; keep the G key held down, then let go of Shift; let go of G and .. uh-oh.. still turboing

ummm i thought this was a feature, i've had turbo bound to ? for ages

Ohh that, that's a 'feature'.