Squid-3 errors and blank pages

Squid-3 cvs seems to be functioning for me now - it's usable again but I am
seeing lots of errors like this logged on random pages:

2006/05/01 23:07:12| http.cc(1866) Transaction aborted while reading HTTP body

This corresponds with this code in http.cc :

HttpStateData::requestBodyHandler(MemBuf &mb)
{
     if (eof || fd < 0) {
         debugs(11, 1, HERE << "Transaction aborted while reading HTTP body");
         return;
     }

Has anyone got any clues as to what I could do to narrow this problem down?
It's happening frequently but not on every page.

Reuben
Received on Mon May 01 2006 - 06:46:59 MDT