Google blog search stopped auto-prefixing urls with the “link:” operator when you enter them in the search box. A search for something starting with http:// or looking like a domain name, used to be converted automatically in a search for backlinks (for a specific post, or for links pointing urls within a domain).
That’s no longer the case, as you can see in the screenshot, whereas an explicit link:pascal.vanhecke.info still gives the expected result **:
** I did some googling to verify the behaviour really had changed over time, but this early Google Blog Search review confirms:
Interestingly, Google Blog Search automatically prefixes a URL search with the link: operator, defaulting the search to incoming link sources.