[typo] ecto + apache proxypass = no uploads?

[bodhi]

Hi all, this isnt really a typo issue, but maybe some others have come 
across it...
i have typo setup on textdrive under lighttpd (proxied through apache), 
and when i try to upload files with ecto, i get a HTTP 412 
(Precondition Failed?!) error from apache, lighttpd never even sees the 
request. if i configure ecto to go directly to the lighttpd port, it 
works fine, but then i have to edit the posts and remove the port 
number from the html links. has anyone else come across this problem? 
help!

bodhi