I have enough problems with my eyesight, and now I have problems, apparently only with Opera Browser, with text that will go fuzzy, then clear, then fuzzy again, ad infinitum. It makes me think my eyesight is going bad.

I've seen this problem written up elsewhere, and I've tried everything - disabling dpi on both the program and on my display, but the problem persists. What am I missing? What else can I try?