The problem is that Maverick has a 2.11.x package which was still an intermediate serie before stable 2.12.x was released, which you can get here:
http://www.webupd8.org/2010/09/gthumb-2120-stable-has-been-released.html
2.12.x has the slideshow
The problem is that Maverick has a 2.11.x package which was still an intermediate serie before stable 2.12.x was released, which you can get here:
http:// www.webupd8. org/2010/ 09/gthumb- 2120-stable- has-been- released. html
2.12.x has the slideshow