[spoiler=title] doesn't work. You can't give a title to your spoiler, you will have to write it above.
[quote=name] works differently. You need to put the name between quotes, like this: [quote="name"*], without the asterisk.
Size tags work differently. The normal size is 12. Anything below is smaller, and anything above is bigger [/obvious].
Some fonts and colours may not work, or give completely random result depending on what browser and what OS you are using. Use fancy stuff at your own risk.
To strike down text, the code is [strike*] (without the asterisk), not [s].
For links, the code is [*url=http://whatever.com]link name[/*url] without the asterisks and without quotes.
This is all I can think of right now.