Thanks for the response. As it happened, I hadn't updated my 680, yet
it was still working with an 8 and 16 GB SDHC card. This morning I
completed the update, and although it didn't fix the problem I
originally described, I found a workaround. (I should also point out
that the larger SDHC cards continue to work fine with other uses on my
Treo 680, both before & after the update.)

The workaround was pretty simple, just to stick in a 2GB SD card to
download a licensed audiobook through the Overdrive Media Console to
my Treo using Pocket Tunes as a recognized player. Once that's
finished I copy the files from the 2GB card to the 16GB card and it
works! I imagine the key part is that I copy everything from the
smaller card to the larger one, not just the audio files themselves.
There's some sort of license file that needs to be transferred in
order for the audio to be playable on the larger destination card, and
the easiest way to make sure that happens is just to copy everything over.

Success!

-Mark

--- In pockettunes@yahoogroups.com, "Dave" <dave.jones@...> wrote:
>
> Hi there,
>
> Make sure you have updated your 680 to support SDHC cards. Without the
> update the 680 does not support SDHC, so results can be unpredictable.
> Also make sure you have a card that is no larger than 4GB as that is
> the largest size Palm recommends for the 680, even with the update. We
> have a link to the Palm information on card size and type support here
> http://normsoft.com/s/f.php?id=11 .
>
> The issue as you describe it sounds to me like an issue with the card.
> So if it is not the above, it could be a bad file on the card or a
> defective card. If you have the update and the card is 4GB or less,
> try formatting it with CardInfo.
>
> If the issue persists after the format, contact us in support
> http://www.pocket-tunes.com/scripts/support.php .
>
> Take care,
> Dave
> NormSoft Support Team
> NormSoft, Inc.
> www.normsoft.com
>
>
>
> --- In pockettunes@yahoogroups.com, "Mark Johnson" <Mark.Johnson@>
> wrote:
> >
> > I've been using Pocket Tunes Deluxe ever since I got my trusty Treo
> > 680. When my local library system started offering downloadable
> > audiobooks via Overdrive Media Console, I was very happy to find that
> > worked flawlessly with my system. Later I tried using an SDHC card
> > with the Treo, and though that has worked fine--including playing
> > media through Pocket Tunes on the larger card--it is no longer working
> > with Overdrive Media Console.
> >
> > I've tried transferring media files from the PC to the Treo both
> > through the Overdrive application, as well as sync'ing in Windows
> > Media Player. Both operations eventually time out on the PC side and
> > lock up the Treo. When I tried swapping out the SDHC card for my old 2
> > GB SD card, it worked again. So, it appears that SDHC is the culprit,
> > at least within Pocket Tunes.
> >
> > I listen to a lot of podcasts, too, but those download as simple MP3's
> > that I can just copy & paste over the SDHC card directly. The
> > downloadable audiobooks are WMA files that need the appropriate
> > playback license to be transferred(?), which the Overdrive application
> > normally takes care of.
> >
>