Mandigo – images problem

hi all,

i’ve tried the mandigo theme lately but i’ve found some kind of problem with my posts : lots of them have an image in first place, then some text.
for comparison : a test blog with mandigo and my actual blog. as you can, the first image doesn’t appear in mandigo.

it’s probably a css problem (i’ve tried all the images options of the theme), but if there’s a known workaround, you’re welcome. (did some search but found nothing)