On my iPhone 4 (iOS 5.0 (9A334)), after interrupting a podcast I was listening to at 2x speed to take a call, the podcast speed changes to 1x when the call ends.
Try it yourself:
- Start a podcast at 2x speed
- Make a call (via Voice Control) or receive a call
- When the call completes the podcast starts playing again automatically at 1x
Normally, the podcast resumes at 2x speed. As a work around, I pause the podcast with my wired handset, then press play and it resumes at 2x speed. If you’re having the same issue, report it as a duplicate of Bug ID# 10399008.