Strange iPhone crash log

Question

Can anybody tell me the reason for this crash.

Specially I am concerned about this -

**Application Specific Information:
iMixtapes[1185] has active          


        

Answer 1

See this question for the same error. The answer there is:

This means that EVERY background task created with beginBackgroundTaskWithExpirationHandler: call MUST be ended withendBackgroundTask:. Double check that endBackgroundTask: is invoked with the correct task id.