Three questions

So, I've got some questions again. They don't have much in common, but I didn't want to create three new threads for every question, so yeah...

1. This is not exactly a question: Is there something (like a pattern) you guys would recommend for ceiling flats besides FSky?
I'm unsure whether I should simply use the flat equivalent of the wall texture I used or a different one instead. Is there a general rule of thumb for that?

2. In Workbench, I can't seem to select or even highlight flats and textures in 3D mode, which is strange, because it worked on another computer. Does anybody know what might cause this?

3. In Srb2, if you run against a wall, you don't accelerate and "walk" against the wall.
However, in my level, this happens sometimes:

I use ZenNode.

Thanks in advance.

1. No, not really. Just... Don't put grass on the ceiling. Unless its a nights level. Then go almost crazy.
2. I can't help you there, other than telling you to use a new map editor. Sorry.
3. Actually, you do all the time. If you're at a strong enough angle with the wall.

Bumping this for questions 2 and 3. Hope that's okay.

Anybody got an idea regarding those?