Pik -
I know a way to fix that, assuming you're willing to do some work and you have the original files on hard drive.
You have to edit the chapters and change the font to Times News Roman. That font they can't screw up.
When it happened to my two current fanfics, it took me a few hours to do it, but I fixed them. I'll be fixing my own archived fanfic soon. I do not believe the damage done to existing stuff can be repaired by the staff here.
- Venusaur