I really like the Stack Exchange family of sites. I was just getting ready to ask a question on the AskUbuntu site when it pointed me to the exact question I was about to ask. They’ve had a pretty good suggestion thing from day one when you tabbed from the title to the question but now it also seems to keep analysing the body of your question too.
If you are having issues with the tab complete functionality in bash since upgrading your Ubuntu to Natty this appears to be a good explanation of the problem and I’ll be trying the solutions suggested shortly. At least I know which part of the system is broken now.