I have a recurring issue in the Technic Pack whereby occasionally when I load up my world (usually after the computer having been shut down for some time) my inventory is wiped and I am placed on the overworld spawn. The rest of the world will be exactly how I left it, except that I am standing at the spawn with a totally blank inventory.
The only pattern I can find is that it doesn't seem to start happening until I start exploring Mystcraft ages, so it might be linked to that. It seems like something corrupts my player info causing Minecraft to reset me, but it never causes any crashes or visible errors, and has never done this directly after a crash or out-of-memory shutdown.
Additionally, after the first few times I made sure never to exit my world whilst still in a Mystcraft age, but this seems to have no effect.
Does anyone have a solution for me?