Anyone know how this might have been disabled somehow in the editor?

Try the following, if not yet tried:
1. run devenv /safemode from command prompt
   check to see if tab key works then

HTH
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Hide JIT Debug Error
which is best?
Consuming event of a class in collection
Facing precision issues with "double"
Can't open 'Samples and Quick Start Tutorials'
Should I use VS 2003 or 2005 for IDE? I have both.
msgbox function
default for MailMessage from property
system calls
any idea why I cannot instal VS NET 2003 on win dows server 2003