I had to do some digging, but I found the issue he was talking about and the plugin to fix it. The problem with Sublime Text 2 is that the cursor is very thin and hard to see. The plugin to fix it is https://github.com/netpro2k/SublimeBlockCursor

If you don't want to install that plugin, you can get a more visible cursor by adding "caret_style": "wide" and "highlight_line": true to your Sublime preferences.

I'm not sure why the author avoided mentioning the specific issue. If it affected him and his friend, it seems like he would want to err on the side of telling others about it.