To correct this "problem", you can try clearing Eudora's ad cache. Eudora keeps the ads in a directory called Ads in the Eudora folder.
- Quit Eudora if it is running.
- Go to your Eudora folder.
- Open the EudPriv folder in it and then the Ads folder.
- Delete all the files in the Ads folder.
Now you can restart Eudora to see if the problem continues, and maybe you are blessed with some new advertisements.