MTurkConnection.get_all_hits() and MTurkConnection.search_hits() not returning HITs created before July

[Aaron Steven White]

I have 43 recent HITs (from within the last two weeks) associated with my requester account and hundreds more from before then. I would like to pull the last 400 down (including the older ones), but [h for i in range(40) for h in mturk.search_hits(page_number=i)] is only pulling the most recent 43 down. These 43 are also the only ones I've run since the rate hikes. Is this a known issue, possibly having to do with an API change after the hikes? I'm using boto v. 2.3.8. How can I get access to those older HITs?

Aaron