I have a metadata set which is part of a content type attached to multiple document libraries throughout my site collection. This metadata set allows multiple values. The metadata set isn't showing in the list when I configure my CQWP to crawl all sites within the site collection. It DOES show up when I point the CQWP to a specific list.
Reading up on this issue, it seems to be a limitation of SharePoint, although I am not sure why. Why would it work when pointed to a single document library, but not when crawling through the subsites?
Anyways, accepting that there is no OOB way to do this, is there a SIMPLE CQWP that I can download and deploy to my site collection which would allow me to do this? I would like something that is easily configurable, and preferably solves this specific limitation of SharePoint, as opposed to a large solution that 'does it all'.