We just migrated our map services to a 10.1 ArcGIS Server. We have two web apps, and since the migrations, weird query erros are showing up. If you go the service, and select one of the layers and query it with just "1=1", it returns an error, if you just click again "get", then it returns results.
It is resolved with 10.2, but there are also some workarounds described in the link above.
Hope this helps.
Many thanks for the reply. I am logged in to the forum now, and every time I click this link, it asks me to log back, after which it takes me to this page which doesnt seem like the one you intent.
