[iamben]

As many others have said here, I have this not just as a 'programmer', but as person - I think most people do. Sometimes it's crippling, sometimes not.

For the most part, you have to ask 'what am I worried about'? Usually it boils down to an issue with your own ego - the idea of failing or looking stupid, usually in front of your peers. If you can get over that, everything becomes a lot easier.