Gareth

If you wish to get your inventory back rename level.dat_mcr to level.dat in your game save directory. Also look in your resource folder (and the one within DIM-1) and remove the .mca files which are the anvil ones. Minecraft 1.1 uses the .mcr while Minecraft 1.25 uses the .mca and will convert the .mcr files to .mca if it needs to. The only thing I have lost now are the achievements and the mini map waypoints. Any idea where these are stored. There might be a backup in the .technicssp/backups folder that I can restore.

Dont force quit. I have found if you quit normally and then restart the launcher and manually choose the build to run (choose the latest minecraft 1.1 version) and load your normal game then everything is back apart from the stuff in your inventory. Thats what I did and I am back up an running without loosing the changes since the last backup a couple of days ago. I also copied across the level.dat from my backup to get my inventory back (mostly).

I have exactly the same problem aswell.