1. My story-tab in the Tech-Room is empty... Nothing at all there...
Is this (CVS)-Code-Related? Can I do something to get it back?
Pilot file related, though I'm not sure what has brought it on all of a sudden. I'm missing things from my main pilot file, but I've been using it for a very long time so with all of the pilot file changes that's not strange at all for me. The missing intel seems to be the biggest problem right now but I haven't bothered to check into it again. The new pilot code will be available next month so fixing the current problem is just a waste of resources. Hand editing the new pilot files with a hexeditor will be much easier since everything is sectioned off with a special header. Fixing the missing entries will be pretty easy then and I would assume that a GUI editor will get made at some point since I'm making it a point to have the new files both easier to dissect and fully documented.
2. The debug-build doesn't work (Linux-CVS - Doesn't work since a few days/weeks).
You are mixing VPs or have a bad weapons.tbl somewhere. It works fine for me so this should just be a content issue rather than a code issue. The debug log will now list all cmdline options and all roots (directories and VPs) used by CFILE. That should help narrow down the problem a bit if you want to have a look at that, or just post it so I can look.
Now the requests
:
1. Ctrl+Shift+S shows ALL ships in the Tech-Room. Could you code an shortcut (maybe Ctrl+Alt+W) to show all weapons?
That would be great for custom-weapons...
It's on my todo list but I haven't yet decided if there should actually be a new shortcut for the weapons and intel entries or not. Ctrl+Shift+S was just meant to be "show all" and not really specific to the ships list. I think I'll just go ahead and make the current shortcut work for everything and if anyone hates the idea then it can be changed later.
2. Is there a way to play only ONE piece of music (e.g. one song in ogg-format)?
Not event-based?
Xmms.

Just use -nomusic and the event music won't play, but you should still get all voices and things.
Of course you may have had something else in mind for that question and there is a sexp for playing a particular file which isn't tied to the event system. Not sure exactly what that sexp is but there was/is probably and Mantis bug about it not working filed in the past couple of months. This all assumes that are using your own mission or an edited one though.