A friend of mine reported this bug to me, and I realised I had it to. Here's how to replicate it:
- 1. View menu > Layout > Columns: 2
2. Select the vertical separator in the middle, and expand one of the columns all the way to the edge of the screen (thus totally shrinking the other column)
3. Sublime Text 2 stops working
This bug was found in Windows 7, version 2.0.1, build 2217.