How can I find out why vim keeps changing my expandtab setting

Question

I use vim. Specifically I am using Janus. I have expandtab set. However, during the course of using vim, for some reason, my expandtab setting gets set to noexpandtab, and my files start to gain hard tabs. I have tried typing :verbose set expandtab? but this does not show me anything (specifically, it shows me that noexpandtab is set, but it doesn't show a file that is responsible for setting it).

So I would like to find out:

• Why my expandtab setting might be changing
• How I can track down the culprit and prevent it from happening

Thanks

Answer 1

Try this

:verb set expandtab?
:verb set et?
:verb set invexpandtab?

expandtab can really be set in a number of ways :/