[TYPO3-UG Australia] Invalid at the top level of the document error

Wed May 17 13:12:21 CEST 2006

Invalid at the top level of the document. Error processing resource
'http://www.domainname.com/typo3/mod/tools/em/index.php?CMD[showExt]=sys_tod
os&CMD[load]=1&CMD[clrCmd]=1&SET[singleDetails]=info'. Line 1, Position 1 

Column 'content' cannot be null<!DOCTYPE html
^

Now what have I done? I haven't directly touched this file, but it appeared
when I started reinstalling extensions that I had removed when trying to
troubleshoot my last problem.

:-( the quickest way to learn is to make mistakes I suppose...

Cate