My Tarmac creaks...more specifically, it 'clicks'. It didn't do this when I first picked it up.

At first, I thought it was the crank as it is only obvious under load (particularly on hills)...but after the LBS couldn't find anything amiss...I think it's coming from the headset/stem/handlebar area.

I've seen a couple similar threads that discussed similar issues. (seems I can't ever find threads when I need them)

Any anyone have a similar problem? I seem to be able to replicate the sound by putting weight on the handle bars as if I were climbing (side to side...one 'click' per side)...the bars themselves don't seem to be slipping...

It's starting to drive me nuts.