Using the other meta page (I patched the transaction number), mdb_stat shows the freelist is already corrupted, see below.
I have uploaded the broken mdb to http://cdn.skov.com/www/CWE/data.mdb_at_crash_time
This is a database with MDB_NO_SUBDIR from a 32bit little endian system.
Reader Table Status (no active readers) 0 stale readers cleared. (no active readers) Freelist Status Tree depth: 1 Branch pages: 0 Leaf pages: 1 Overflow pages: 0 Entries: 28 Transaction 128121110, 3 pages, maxspan 1 762 1038 1452 Transaction 128121111, 5 pages, maxspan 1 48 1157 1281 1300 1468 Transaction 128121112, 6 pages, maxspan 1 [bad sequence] 229 229 569 1317 1444 1460