Yeah we get tonnes of them, probably 90% of the Javascript errors we get are false positives (n.b. we aren't using the Airbrake service, just their gem with Errbit).

Here is a sample of a few we regularly get:

* Out of stack space

* TypeError: Unable to delete property.

* [object Event]

* Error​ load​ing s​cript

* Synta​x err​or