HTML escaping - Firefox vs IE

First of all a big Thank you to Mr. FCK, and everyone who contributed to the project.

I'm trying to integrate RC3 in my project and I ran into 2 issues that I can't figure out so any help is greatly appreciated.

1.) I'm inserting '{' in urls so that I can parse it later but in IE they get into source unescaped, while Firefox (ver 1.0.1) escapes them.

For example (source view in FCKeditor):

IE <a href="http://{{{PATH}}}/file.php">Link text</a>
Firefox <a href="http://%7B%7B%7BPATH%7D%7D%7D/file.php">Link text</a>

2.) Is there a way to configure FCKeditor so that both browsers do the same thing (I'd prefer to have them unescaped if possible)?

And one other thing, is it possible to have list of plugins configured from php? I'm looking for php syntax to replace js in fckconfig.js.

For example how would I do the following in php?

FCKConfig.Plugins.Add( 'placeholder', 'en,it' ) ;

Thanks,
Uros