Bitcoin client stuck. Tried to rebuild whole blockchain, but it went up to that number and got stuck again.
Here's a screenshot: http://vvcap.net/db/2IR75OWyJj5AsUW7eo_i.htp
I just downloaded version 22.214.171.124 to try to reproduce your problem, but couldn't. Here's the beginning, and relevant mid-section of the debug.log file when I ran it on a machine which I hadn't used for a month or so:
Bitcoin version 0.4.1.1-beta Default data directory /home/user/.bitcoin Bound to port 8333 Loading addresses... dbenv.open strLogDir=/home/user/.bitcoin/database strErrorFile=/home/user/.bitcoin/db.log Loaded 19026 addresses addresses 1337ms Loading block index... LoadBlockIndex(): hashBestChain=000000000000052e27b6 height=173760 block index 13603ms Loading wallet... [...] SetBestChain: new best=0000000000000959beb5 height=176945 work=302325188992488282894 SetBestChain: new best=000000000000011c616f height=176946 work=302331966182716897933 SetBestChain: new best=000000000000052c233f height=176947 work=302338743372945512972 SetBestChain: new best=00000000000002c5eaa8 height=176948 work=302345520563174128011 SetBestChain: new best=000000000000089bf6dd height=176949 work=302352297753402743050
Maybe you could show us yours? I tend to agree with Stephen that it's likely a disk space problem.