The problem is that I can't see a thing when I try to edit preferences because of the following screen:
Click on the image to open a full resolution version.
I am running 32 bit 12.10 and using opera 12.15.
What I have tried under others advice:
I have tried changing the theme but this failed (both to the default and to another custom theme too). I have also tried opening up a terminal window in front of opera with preferences opened and this failed too.
opera:configto make any changes to the settings you need. Click on the "Help" link on top to search for help on specific settings. You must be prudent when making changes from theopera:config. – carnendil Apr 19 '13 at 17:11