I was looking at telemetry and discovered that the passage that leads North out of the boss room for Telemus caves was incorrectly connected to an older version of the neighboring room. You'd only hit this if you left the boss room to backtrack to the rest of the cave, but at least one user did precisely that. If you continue north through the old\broken version of the room, the next room up is 'correct' again (although you pop out in a harmless but weird location).
This update connects the rooms correctly and fixes a few other stitching oddities on various maps later the game. My apologies for the bug; if you did get into the old version of the room, just exit it to the north. If that doesn't fix you, mail me at [email protected]. I will find a way to get your save game fixed :)