The search itself has been rewritten for 7.6.0, which is the upcoming release; this particular item was fixed in
this progress report.
A release date is still not known at this time as there are still several items that need to be tackled before a full release is pushed out, and we only have one active tester other than id242 and myself, at this time.
As for your particular issue, the supplied post date seems off:
SQL Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') AND p.POST_POSTED_TIME > '1413393046' AND p.POST_POSTED_TIME < '1444842' at line 8
I'm not sure why, but "1444842" isn't a valid unix epoch date.