I am doing this from memory from work. Basically, I have libjpeg-turbo8 installed. But I have libjpeg-turbo8:i386 installed at version xxx4.4 and libjpeg-turbo8:amd64 installed at version xxx4.3. I am not sure how this mismatch happened. I believe that 4.3 is the right version, so I would like to roll the 32 bit version back. apt-get install libjpeg-turbo8:i386xxxxxx4.3 did not work (as it was still complaining that it couldnt do anything because of the mismatch). Basically, I cant do anything with apt-get because this mismatch is causing dependency hell. What is the proper way to resolve this. The box is 64 bit 12.04.