I think I have a working solution to the "disappearing" align attributes:

first i added rel=0 to the tinyMceconfig.config as instructed above

then i added rel to the <imaging><allowedAttributes> in umbracoSettings.config which I found in the same folder.

(to get the webserver-remotely- to reload the changes i changed the web.config )

This seems to have the desired effect. See the changed line in umbracoSettings.config below.

Sjoerd
=============================================================


<imaging>
<!-- what file extension that should cause umbraco to create thumbnails -->
<imageFileTypes>jpeg,jpg,gif,bmp,png,tiff,tif</imageFileTypes>
<!-- what attributes that are allowed in the editor on an img tag -->
<allowedAttributes>alt,border,class,style,align,id,name,onclick,usemap,title,hspace,vspace,rel</allowedAttributes>
</imaging>