db-connext.txt in /tmp grows like mad

Its full of these:

2009-04-25 18:21:17 Can't select Resource id #11 -
Array
(
[db] => bloghost_wpmu
)

2009-04-25 18:21:17 Can't select Resource id #9 -
Array
(
[db] => bloghost_wpmu
)

2009-04-25 18:21:17 Can't select Resource id #11 -
Array
(
[db] => bloghost_wpmu
)

2009-04-25 18:21:17 Can't select Resource id #11 -
Array
(
[db] => bloghost_wpmu
)

The txt file grows like 20mb a day. How can I find the source of this? I've searched this forum and seems like another user had this problem, which was caused by some kind of loop from RSS (blog calling own RSS) I believe? I am not sure what to do here.