Moving from HTML 4.1 to XHTML 1.1

I gave skaelede online a fresh new look sometime ago. By changing the design, I've did some changes on the background too: I've updated the XSL engine to generate XHTML 1.1 output instead of the good old HTML 4.1 way. I do not want to miss in details, you can check out the original source code, I just want to add some notes on the workarounds (that I usually forget:) ) 1) The MUST BE html, instead of using xml. Internet Explorer would save the file down, or open it with the associated XML-handler application, but not display it as an XHTML page. 2) You can not use </img>, so you cannot have to images :( I do not know any workarounds to this problem, yet. 3) The hspace and the vspace attributes should be replaced with: style="margin-left:0px;margin-right:0px;" 4) The border attribute must be replaced with style="border:0px;". I just wonder, why W3C didn't have an upgrade guide for all the folks who try to follow their changes...