[Perkin]

For the Image problem, In code view, search for

Images/Enska Texta Reikn_fmt.gif

and when found alter the gif suffix to jpg.
That should clear up that one.

As for the Font problem, in the Book Browser window, do those two fonts exist in the Fonts subfolder, if they do, look in the CSS files for the fonts and alter their paths from
Styles/Baskerville to Fonts/Baskerville

Edit:
Reading your message again, the fonts look as though they're in the Styles folder, so again llok in CSS files for fonts and change their paths from
Fonts/Baskerville to Styles/Baskerville

Then save, and then reload the epub, that should fix it.