A few last versions of Nokia Sports Tracker for S60 devices (including Nokia E71) are facing problem with application’s freeze, after a few minutes, or kilometers of active tracking. The problem is present no matter, if you are using internal GPS module, or external one, connected via Bluetooth.
It seems that Beta Labs team is familiar with this problem, because a lot of users posted and mailed them with bug reports, but still there is no official fix for this issue. Thankfully on Nokia Discussions Board user ggm02 published a workaround for this issue. How to make it working?
Start Sports Tracker as usual, after it connects to the satellites and starts tracking use navi-key (for example press it twice up) to see a diagram screen. Now you can hide application in a background and it should work fine. The problem with freezing seems to be present only when you keep application working on a main screens where speed and distance are constantly displayed.
Here is original solution post link