Will not help with these display problems (yellowish left side, darker left side).
The app does not change anything in the driver or display.
Very useless app.
Supercurio (Voodoo control for SGS1) works on a solution for SGS2. But it is very complex to reverse-engineer the Samsung drivers, hardware registers and settings.
Regards
If you want to minimize the yellowish left side, use the new kernel from Samsung stock firmwares, such as from KH1 forward, or use the one of CF if you want root. After that, use Screen Adjuster to make white color becomes whiter by increasing blue. The program does not make the yellowish left side disappears, use have to use the new kernel first.
Cheers.