Also, like ISBNs, you cannot have a two URIs in the same Ids field.
You can have a URL and a URI, but then only the URI (calibre sorts the Ids alphabetically, it seems) shows as a click-able link in Book Details.
Eg.
Code:
uri:http|//www.gutenberg.org/ebooks/8914, url:http|//www.mobileread.com/forums/showthread.php?t=183220
is OK but only the Gutenberg link is click-able.
When you change the URL to a URI like this:
Code:
uri:http|//www.gutenberg.org/ebooks/8914, uri:http|//www.mobileread.com/forums/showthread.php?t=183220
the MobileRead link overwrites the Gutenberg one.
You end up with only this:
Code:
uri:http|//www.mobileread.com/forums/showthread.php?t=183220
That's a shame.
It also means I can't have a click-able link to the MobileRead thread as well as Zelda Pinwheel's Id that she put in her Three Men In A Boat upload.
This doesn't provide a click-able link:
Code:
uri:zelda@mobileread.com|2010040720, url:http|//www.mobileread.com/forums/showthread.php?t=48377
Pity.