New Post: missing icons?

Hello,

I noticed that the nb_store jqueryui calls for some icons which donot seem to be there, such as:

/DesktopModules/NB_Store/js/images/ui-icons_cd0a0a_256x240.png
/DesktopModules/NB_Store/js/images/ui-icons_2e83ff_256x240.png

Any idea why? Or is anything I did?

Thanks
Franco