Allowing (some) HTML in posts

I need to allow some HTML in my forum.
Nothing really dangerous; some tables, fonts, img and little more.

I have enabled blnHTMLView in RTE_setup

This is my test post



It seems OK,

BUT when posted it looks like this



And comming back to edit I find



Bacground color has gone... and a pair of <t> have appeared.

Any ideas about this?
Thanks in advance

I know you're right, and I don't  like the idea very much but many users of the old forum love using tables inside tables with backdrounds over backdrounds (all they saw in MSN groups).
I am plannig to build a new forum and WWF seems a good chioce, but if i cannot give them tables and tables (and very few other things, I promise) I would need another software.

I've changed saryUnSafeHTMLtags(108) = "bgColor" in unsafe_HTML_tags_inc and the background now works.
I hope that won't open a security hole

I'll take a look at "XSS Hacks"

Thanks for your advice

Unfortunatelly, MrTWS, most of the posts in the forum that is currently running are something like this:



And this is what they want in the new forum.
Security? Who cares!
It's only me who have to deal with that.

Most of this "artistics" is done with table, border and background, cellspacing and cellpadding.
I don't think this these tags to be specially dangerous, but I might be wrong.
I'm planning to enable as few tags as possible in order to keep risk at an acceptable level.

The "old" forum has been running since 2005 with few problems using tables inside tables inside tables with classes that don't exist, div's, p's, font's...
Maybe we have been lucky all this time.

Ah! I almost forget. Another thing they love is playing music. Bgsound is their favourite (I hate it).

It's not my choice, it's only my work.

I understand you both. I hope you understand me.

Thanks to both of you for your advice.
I'll be as careful as possible. I promise