[NELO] Thumbnail (featured image) problem + gallery in sidebar

hi there !

Oups surprise this morning :
1 - thumbs in posts dont apply in Nelo ! (GD is installed of course)
2 - Using nextgen gallery, images dont show in sidebar nextgen widget. (it does in any other theme)

By thumbs I precise the new "featured image" in WP3. Images IN the post show of course.

EDIT :

Strange thing :

The thumb appear in frontpage "latest news" section, but NOT in the post itself Oo

Precision : the "latest news" text string does not translate....