The timestamp output is a bit crazy...

A job that took 27 minutes and started at 1:09pm local time shows the time stamps as (I'm just showing a few):

04:07
23:12
00:10
06:09
07:26
11:33
...no timestamps for the rest...

I have the following traceback in my catalina.out log:

Jun 21, 2013 1:48:54 PM hudson.plugins.timestamper.annotator.TimestampAnnotator annotate
WARNING: Error reading timestamps for gerrit-master-AppBuilder #116
java.io.IOException: Malformed varint
at hudson.plugins.timestamper.TimestampsIO$Reader.readVarint(TimestampsIO.java:393)
at hudson.plugins.timestamper.TimestampsIO$Reader.next(TimestampsIO.java:323)
at hudson.plugins.timestamper.TimestampsIO$Reader.find(TimestampsIO.java:288)
at hudson.plugins.timestamper.annotator.TimestampAnnotator.annotate(TimestampAnnotator.java:84)
at hudson.console.ConsoleAnnotator$1Aggregator.annotate(ConsoleAnnotator.java:111)
at hudson.console.ConsoleAnnotationOutputStream.eol(ConsoleAnnotationOutputStream.java:145)
at hudson.console.LineTransformationOutputStream.eol(LineTransformationOutputStream.java:60)
at hudson.console.LineTransformationOutputStream.write(LineTransformationOutputStream.java:56)
at hudson.console.LineTransformationOutputStream.write(LineTransformationOutputStream.java:74)
at org.apache.commons.io.output.ProxyOutputStream.write(ProxyOutputStream.java:70)
at org.apache.commons.io.output.CountingOutputStream.write(CountingOutputStream.java:71)
at org.kohsuke.stapler.framework.io.LargeText.writeLogTo(LargeText.java:218)
at hudson.console.AnnotatedLargeText.writeHtmlTo(AnnotatedLargeText.java:159)

Our slaves are are running NTPd and have their clocks set correctly.