My understanding is that thorium burn has been successful in CANDU reactors:
http://www.nuclearfaq.ca/brat_fuel.htm

If this is in error, perhaps you would supply better data.
Thanks.

I'm not an expert in this technology, but this was my conclusion I remember from a general research on this technology a few months ago. As for your weblink: Keep in mind that this document is from the Atomic Energy of Canada Limited, so the author may tend to have a rather optimistic look on the outcome. To be sure you should also check it with statements from neutral or sceptical entities.

I just grabbed the first one that came up on a list by googling, as it is, AFAIK, common knowledge.
If you don't like my link, do you actually have any links at all or information to support your statement?

Yes, of course, but from a certain point I concluded to discard this technology, so I didn't collect much data.
But if you find something that might convince me please free to post it right here or send me a short email.

Not a problem, and if I chance on anything authoritative I will forward it, as I have not bothered investigating as AFAIK it is not in question - incidentally the Westinghouse reactor is also supposed to be adaptable to burn thorium.
Perhaps it is worth pointing out though that I believe the conventions of this site, at least as I have observed them, are that when you are asked for your sources for statements such as you made you substantiate or withdraw - not liking the link I gave is on a different level to not having any backing at all.
I am not too bothered about it though, so unless I hear something from you which substantiates in some way your comment, I will continue in my previous persuasion.

I've spotted a more detailed discussion here:
http://www.world-nuclear.org/info/inf62.html
Thorium

You are correct in that not every issue is fully resolved especially the high cost of fabrication as thorium is cheap enough that reprocessing issues are hardly critical for the present, but the main reason for the lack of development appear to be the same as for all the more advanced techniques, that uranium is so cheap and plentiful at the moment that no-one has bothered to develop alternatives.
But to conclude from that that the difficulties are so severe as to warrant 'discarding the technology' as you have done is strange, and may perhaps indicate that you were in no mood to reach a favourable conclusion regarding the technology, IOW perhaps looking for an excuse to reject it.
Everything has some level of difficulty, and thorium technology is hardly unique in this.