Firmware: 5.9 or 6.0
The temperature is not registered in the track (current.gpx).
<trkpt lat="30.3584944643" lon="-18.6850891449">
<ele>628.36</ele>
<time>2012-09-23T09:13:35Z</time>
<extensions>
<gpxtpx:TrackPointExtension/>
</extensions>
</trkpt>