We've found the the autolink feature is automatically converting urls to all lowercase letters.. This causes problems with links to *nix servers that are case sensitive.. Case in point..

http://www.rosetown.ch/News/Museum.htm

(crossing fingers that it works the way it is on my site.)

yep.. same behavior here.. the displayed url is the same, but the actual linked url has been converted to all lowercase.

This is fixed in AF 4.2.5

Thanks Will!