DVD: Gallery not working // menu issue

[whismerhill]

hello out there,
wanted to report a couple of problems I have with some DVDs I bought

1) when viewing bonuses: some bonuses consist of galleries of pics, these cannot be viewed at all according to my experience (unless I missed something)
the image tells you to use forward >>| & backward |<< buttons to switch between pics, however it doesn't seem to work neither does any button I could find...
example of DVDs containing galleries of images :
-Shakugan No Shana Season 1 (FR title : Shakugan No Shana L'intégrale Saison 1)
-Koy Kaze

2) VLC is not able to read episode 3 & 4 from the first DVD of "Louie The Rune Soldier Collector Edition" if you select them from anywhere in the menu (either by using play & waiting till episode 3 or by using episode selection to select them directly). VLC will just stop as if I just pressed the STOP button, this happens whatever the PC or DVD Device used, even from an ISO image of this DVD. However a normal non-PC DVD player will read those without problems plus VLC can read the content by reading the VOB files directly

thanks.