The installer allows multiple copies of the game to be installed
Unlike previous Blizzard installers, this one will always let you install another copy of the game. It does not check for previous installations so be careful of how many folders you end up making.
Compatibility Modes will not work properly
Attempting to run StarCraft 2 on a compatibility mode (Windows XP SP3 from Windows 7, for example) will make it crash. Please run the game normally.
User report - Security program flagging the beta downloader as a trojan
We had some reports where a security program might flag the beta downloader as a trojan. It is a false positive.
There have been multiple reports of black screen issues being related to the use of a Quick Cam webcam.
In some cases exiting out of the software has resolved the issue but others have reported a need to uninstall the software for the camera in order to resolve the problem.
There are also reports where some security programs like Comodo firewall can cause the game to start and stay on a black screen.
Some video cards are not being properly recognized by the game. This only affects the performance settings the game will recommend and nothing else. It's safe to ignore the warning and apply the settings as you like.