OT: HTML Editors

[Norm]

I am trying to find a FC6 compatible html editor that works well with 
the W3C standards and also offers a gui layout process.  Seamonkey has 
the gui process but strips out some cosing tags that the W3c standards 
require.  Bluefish does not strip out the tags but is a text only style 
editing process.  The text only editing process works for me but as I am 
trying to find a gui driven w3c compliant editor for a entry newbe web 
design course I am working on I would prefer to instruct the basics from 
a gui perspective.
Anyone know of a FC6 compatible w3c compliant gui html editor.