Fixed in 10.7.3: OS X 10.7 Lion, Screen Sharing and multiple monitors issues

Update: This issue has been resolved in OS X 10.7.3. Please make sure that your Mac is running the latest version of OS X Lion.

Screen Sharing has an issue in Lion (prior to version 10.7.3) where if your main monitor is on the right side, you won't be able to control your computer.

Switch your main monitor (the one with the dock and top menu) to work around the issue. Again, this issue has been fixed by Apple in OS X 10.7.3 so please make sure that you are running the latest version.