The font of the track turns red in case of an error when updating on one of the services on which the track was checked. Perhaps the service site is not available at the moment or the format of the information has changed. Additional information can be seen in the track properties window at the "Log" tab.
Example:
ServiceID:rus,
LastUpdate:13.09.2010 13:54:37,
Finalized:0,
LastError:RequestError,
LastHTTPError: INTERNET TIMEOUT (12002)
ServiceID:china,
LastUpdate:06.09.2010 20:37:50,
Finalized:1,
LastError:None,
LastHTTPError: 0 (0)
Here you can see that the track was checked on the service rus and china:
LastUpdate - the date and time of the last scan.
Finalized - is the flag that triggered the end of processing on this service. It is also visible on the Services tab of the track properties window.
LastError - type of error. 5 possible values: ueNone (No errors), ueWrongService (service description error), ueRequestError (error at sending/receiving data to/from the service), ueParseError (error of parsing of the page with information), ueNoInfo (no information on the page).
LastHTTPError - description + error code WinHTTP. A more detailed description you can find in MSDN, for example the code 12002 means "The request has timed out" - The time has elapsed for waiting for a response from the server.