Rrs & comments parsing error

Once again - this is probably because I am new to wordpress and this fabulous theme.

I am getting this error whenever the RSS or COMMENTS buttons on the top right are clicked

XML Parsing Error: XML or text declaration not at start of entity
Location: http://blog.interviewdiva.com/?feed=rss2
Line Number 2, Column 1:

My site is www.interviewdiva.com. I am running wordpress 2.7 and Atahualpa 3.

I don't know if they were working or if i could have done something to mess them up - I haven't touched the code at all.

Any Ideas? Would this be fixed by upgrading to 3.2?

Thanks - DeEtte
aka zenfull

PS: also getting the following when I tried to access it from feedburner.

The URL does not appear to reference a valid XML file. We encountered the following problem: Error on line 2: The processing instruction target matching "[xX][mM][lL]" is not allowed.