All major photo hosting sites are blocking third party linking (unless you pay heavy $$$!)
Embedded Images on any site (like message boards, auction sites, Amazon, etc.) are no longer supported and replaced by a (probably temporary) warning message. (in some instances it shows a broken link)
Smaller accounts are not yet fully affected but both Imgur and Photobucket have updated their terms of service.
Once it's going to be fully enforced UKMiX will look like a broken image link cemetery. See Graham's post above.