FCKEditor + tag problems

I have a comment regarding FCKEditor and how it deals with tags..

1 - FCKEditor often breaks tags for extensions. For example, it will turn the Wikitext of:
<tag param1=1 param2=2/>
into
&lt;tag param1=1 param2=2/&gt;
everytime you click on Edit.

2 - FCKEditor similarly breaks tags for Semantic Mediawiki. For example,
[[PropertyType::Name]]
gets turned into
[[:PropertyType|Name]]
everytime you click on Edit.

Needless to say, this unwanted changing of tag data is very counterproductive to getting things done.

Thanks!
Melanie R. (melanie [at] cs [dot] vu [dot] nl)