Lost my tracks

Yesterday I discovered something very disturbing. The XML file with the GPS track was missing 40 tracks in the log for the fourth. Not at the beginning or end but just, somewhere…?! This file has thousands of nodes and is almost 1 Mb big. A node looks likes this: <trkpt lat=”52.387110000″ lon=”4.909017000″> <ele>48,5</ele> <time>2009-01-05T07:46:35Z</time> </trkpt> […]