Both my old theme and the new one I have just implemented do not display the thumbs on the front page... it seems a problem with Phpmythumb but I'm not so literate and have been unable to fix the problem despite hours of trying!
If you look on the front page, there should be an image with the top post under 'Latest Posts' but it doesn't work. The same goes for the section below where there are a series of images in a row that do not function (for the carousel).
I am willing to pay something if someone can fix the thumbs for me! Please contact me, and can give you access into the site via filezilla, etc.