Ok, figured out.
It's related to this:
P.S: I have messed up separating URLs when indexing the data so that will be fixed in the near future when I reindex everything (takes many hours).
"Overfeat" comes right after a URL, which was messed up when they are right after/before a line break.
So this:
Becomes this, in my index:
Isntead of the word Overfeat, it is saved as an entire url: "
https://bitcointalk.org/index.php?topic=1065017.msg11414986#msg11414986Overfeat"
Fixed already but I haven't reindexed the posts because honestly there is no need now (if I find another issue, then I need to reindex a third time).