[HACKYSTAT-DEV-L] Eclipse plugin question

[(Cedric) Qin ZHANG]

Not intending to consume too much of your time, but if you know the 
answer or can point me the direction (apart from eclipse api), please 
let me know:

package org.hackystat.sensor.eclipse;
public class EclipseSensorPlugin extends AbstractUIPlugin implements 
IStartup

Does anybody have any idea why the EclipseSensorPlugin is instantiated 
twice by Eclipse?

Thanks.

Cedric