Listed in this forum thread are some common known errors and issues with some potential workarounds to resolve the issues.
For a comprehensive list of issues, please check out the 1.5.1 Known Issues sticky.
- 1. The launcher attempts to patch to 1.5, but automatically quits.
2. The file "/Applications/Starcraft ll/Updates/XXXX.MPQ" appears to be corrupt.
3. An unexpected decryption error occurred.
4. An internal error occurred, please restart.
5. You need an authorized language pack from Blizzard Entertainment to use this language.
6. Crashing at startup (On Jim Raynor's face loading screen)
7. Low performance after updating to 1.5.x
8. It is possible to enter games late when starting matches
9. Using command+left click to select a group of the same unit is not working when "Use command instead of control for hotkeys" is enabled.
This will be updated as information becomes available.