The rule PCI: Credit Card Tracks (wide) generates false positives.
These are some examples of data intercepted by the rule:
4000xxxxxxxx8D9978805000
4373xxxxxxxx4693D3130206562
4000xxxxxxxx2009D373890810900010
4000xxxxxxxx2009D383440810900010
4105xxxxxxxx2DD58109000
All the data were found in shared.tmp file or shared.xml files of the application Skype (different users).
The rule was modified for us by Websense.
Bye