Over the past month or two, I've noticed a problem with the job search.
When I search for "C#" (without the quotes) and check "Allows Remote" under Location, I get a lot of results that do not include C#. A couple of month ago, this seemed to work correctly.
This also seems to affect the jobs that are emailed to me as part of an alert. (I.e., most jobs sent do not involve C#.)