Blocks firefox problem at homepage. Really strange!

Hi all,

       I have a problem with blocks at homepage with firefox.The photos in the blocks are not appeared normally( 3 photos in each row).Instead there is no problem with Internet explorer.
I have tried to change things like width, padding..... but nothing.
You can check this here

Could anybody help me with this please?
The dolphin version is 6.0.0005.


Thank you