asterisk users - Apr 2011 - Call duration problem or maybe calls not hanging up problem

In the last 10 days I've had 4 calls be charged by my provider at 
exactly 12 hours longer than the call actually lasted. I think this 
as all after upgrading from 1.6.17.1 to 1.6.17.2 but I have no way to 
be sure and it's so random. 2 calls 20 minutes apart last week and 2 
more today many hours apart.

Is anyone else seeing anything like this or have any idea where I might look.

They claim it's me but won't know till the get the SIP logs from 
their provider.  It's almost as if someone is using AM and PM and 
getting them mixed up. When I call Australia the calls always hang up 
right around 30 minutes and the first 2 calls did exactly that and 
were billed for exactly 12:30.

It's annoying because it's expensive and my phones stop working for 
no apparent reason.

Thanks, Ira

At 12:38 AM 4/6/2011, you wrote:
>In the last 10 days I've had 4 calls be charged by my provider at 
>exactly 12 hours longer than the call actually lasted. I think this 
>as all after upgrading from 1.6.17.1 to 1.6.17.2 but I have no way 
>to be sure and it's so random. 2 calls 20 minutes apart last week 
>and 2 more today many hours apart.
>
>Is anyone else seeing anything like this or have any idea where I might
look.
>
>They claim it's me but won't know till the get the SIP logs from 
>their provider.  It's almost as if someone is using AM and PM and 
>getting them mixed up. When I call Australia the calls always hang 
>up right around 30 minutes and the first 2 calls did exactly that 
>and were billed for exactly 12:30.

So now I'm replying to myself.  There is one more interesting piece 
of the puzzle. All 4 of the calls were terminated by something other 
than the caller, i.e. in the middle of the call they just hung 
up.  Now my calls to Australia have done this for ages, at 30 minutes 
they just hang up and I've never figured out why, but before 10 days 
ago, they didn't make the provider think the call was still active. 
The two calls that had this problem most recently were both 
disconnected at exactly 20 minutes but billed at 12 hours and minutes.

Ira