New features for Tagging System

Hi there.
I've just uninstalled an old tags system in my forum and I'm testing this great mod in localhost.
Everything is going well without errors, but I've already noticed some things:

1 - It's not accepting special characters like í, à, ç, ã, ê.
2 - It doesn't accept spaces in tags, like "Albert Einstein".
3 - It doesn't accept capital letters in the beginning of tags.
4 - [request] Would it be possible to edit (add,remove) tags outside the topic? It would help a lot in moderating topics.

Regards.