I did try different themes and am still seeing LF as the first line of output.

Katin Imes wrote: 
Hi Kevin - 

I take it you have already switched themes to see if that changes 
anything?

  
Something is inserting a linefeed at the top of all my pages.  I doesn't
appear to be a problem for html pages but this is fatal for RSS feeds. 
I read that someone experienced this with the captcha module but I don't
have that module.  Any suggestions on how to track this down (aside from
disabling modules, which I've done a bit of already)?
    

Cheers,
--Katin