Google is investigating possible issues with what appears to be broken search operators. Specifically issues with the related search command and also intitle and inurl commands. Danny from Google said he will investigate and try to find out what is going on.
Here is the related command issue, see [related:seroundtable.com]:
Danny Sullivan from Google said on Twitter “I don’t know why that’s not working for you. I’ll look at it later.”
Similar to the intitle and inurl commands:
Weird…
