Images not showing anymore after update to vBulletin 3.5.5

[LamBras]

After applying the security update to vB 3.5.5, images in my gallery are not showing up anymore.
On top of that, it looks like the gallery templates are no longer cached:

Uncached templates: adv_gallery_footer (1)
Uncached templates: adv_gallery_imagebit (6)
Uncached templates: adv_gallery_navbar_newestbits (10)

The gallery is located at http://www.dvdboard.de/galerie/

Help, anyone? Thank you.

[LamBras]

To answer myself: I overlooked the sticky My Gallery is BLANK after vBulletin upgrade.