beginner emacs question regarding M-<

[dafshartous]

All,
I was using  M-<  to go to the beginning of a file, but now it
apparently doesn't work.  A pop-up came up and had information about
mouse and keyboard configuration.  Now when I try to invoke  M-<  I
get:

No M-x tags-search or M-x tags-query-replace in progress

Did I inadvertently change how it works?  If so, how to get it back?

Thanks!
David