May be for a test a fresh Opera test profile may giv you more

Open DOS box Start Opera by enetering the following command:
"%ProgramFiles(x86)%\Opera\launcher.exe" --user-data-dir="%TEMP%\OPTEMP\ Visit http://www.ubuntu.com/phone/carrier-advisory-group Set your zoom to desired value Scroll

If it is the same problem as before, you have a problem with your graphics card driver on Windows and not with your Opera profile.