A while back, when I opened the Tbird address book the cursor defaulted to the search bar, now it doesn't. Any idea how I can restore this? I looked in about:config but got scared off by the myriad of options. Both Firefox and Tbird are up to date.  I have been advised that Ctrl-K should take me there but it has no effect at all.

I am running Win 7 if that helps.
TIA.