See below. Need to (1) fix and (2) make a test (i take it there isn't one, at least one that has some size, since it wasn't caught by the unit tests. could be a nightly.)

> db.pstats.convertToCapped(800*1024*1024)
{
"errmsg" : "cloneCollectionAsCapped failed:

{ errmsg: \"exception: DR102 too much data written uncommitted\", code: 13623, ok: 0.0 }

",
"ok" : 0
}