I'm getting killed by this bug.
I can log into my developer account and my sandbox account from Force IDE.
When I try to log into the production account I get the following error:
Unable to connect to hostname 'login.salesforce.com':
Invalid username, password, security token; or user locked out.
Please verify and/or change your credentials.
I'm able to use these same credentials to access the salesforce.com dashboard and the Force.com REST API in production.
NOTE: Another account on the same domain works. So potentially locked out from Force IDE? Any tips on finding this setting in the salesforce dashboard?