Apache Errors after 6.0 migration

Hi there

I upgraded a dT server to 6.0.0.6738. After restarting one of the Apache's it gave quite a few of the following error:

2014-08-17 00:05:35.522455 [21668/b7f55ad0] info [native] Starting dynaTrace Web Server Agent (pid = 21668)
2014-08-17 00:05:35.522541 [21668/b7f55ad0] info [native] Attached webserver pid: 21665
2014-08-17 00:05:35.522573 [21668/b7f55ad0] info [native] Reading configuration file: /opt/compuware/dynatrace-5.5.0/agent/conf/dtwsagent.ini
2014-08-17 00:05:43.008150 [21668/b3355b90] severe [native] Error while parsing report: The buffer underflowed: buffer underflow: getLong
2014-08-17 00:05:43.008266 [21668/b3355b90] severe [native] buffer.pos=422, buffer.limit=422
2014-08-17 00:05:54.010048 [21668/b3355b90] severe [native] Error while parsing report: The buffer underflowed: buffer underflow: getLong
2014-08-17 00:05:54.010077 [21668/b3355b90] severe [native] buffer.pos=422, buffer.limit=422
2014-08-17 00:06:05.011899 [21668/b3355b90] severe [native] Error while parsing report: The buffer underflowed: buffer underflow: getLong
2014-08-17 00:06:05.011935 [21668/b3355b90] severe [native] buffer.pos=422, buffer.limit=422
2014-08-17 00:06:16.013781 [21668/b3355b90] severe [native] Error while parsing report: The buffer underflowed: buffer underflow: getLong
2014-08-17 00:06:16.013808 [21668/b3355b90] severe [native] buffer.pos=422, buffer.limit=422
2014-08-17 00:06:27.013683 [21668/b3355b90] severe [native] Error while parsing report: The buffer underflowed: buffer underflow: getLong

The original installed agent was 5.5 which was then upgraded to 5.6 after we upgraded.  We then upgraded to 6.0 and was hoping the upgrade of the server and collector to 6.0 will upgrade the agent.  I know we have to do a clean re-install of the 6.0 to make use of the new Collector Group and Agent Cache configs, which is part of the bootstrap part of the agent.  However the Java agents did upgrade fine, but not the Apache's.

Any ideas?

Anton