If you take a look at edit number 2 and 3 here, you will notice notice that a change has been made that does not appear in the diffs.
I edited this post twice in a short period of time. Both times I took a link out of the pre tag that they were formerly in.
Only my second changes in noted in the diff, and the first change "appears" to come out of nowhere. (ie, the php.ini line changes with no apparent owner to the change)