I found an interesting problem here: after the update for firmware 3.1, the standard voice recorder stopped writing records longer than 35 minutes or 77 megabytes. I am more than upset.
The existence of the problem is confirmed by the thread on the official Apple forum . ')
In addition to this, there is such a glitch: iphone shows the numbers “0:00” when recording, but the recording does not occur and the numbers do not run. Check.