PinListener triggers many times with same value, then segfaults

Hi.
Trying a simple button listener with RPi connected to a gertboard, whenever I press the button connected to configured GPIO (GPIO3 in this case, since only GPIO2 and GPIO3 seem suitable in order to use internal pullups) I get many notifications. Keeping pressed button raises a segmentation fault very, very soon.
This is my PinListener implementation:
public class ButtonListener implements PinListener
    @Override
    public void valueChanged(PinEvent event)
        System.out.println(String.format("Pin %s value changed, now it is %b",
                event.getDevice().toString(),
                event.getValue()));
Sadly, log cannot be captured when there is a segmentation fault, but after many:
Pin com.oracle.deviceaccess.gpio.impl.GPIOPinImpl@b4900588 value changed, now it is true
Pin com.oracle.deviceaccess.gpio.impl.GPIOPinImpl@b4900588 value changed, now it is true
Pin com.oracle.deviceaccess.gpio.impl.GPIOPinImpl@b4900588 value changed, now it is true
Pin com.oracle.deviceaccess.gpio.impl.GPIOPinImpl@b4900588 value changed, now it is true
...i can see on RPi monitor errors like:
javacall_event_send: write of message size failed : Resource temporarily unavailable
Any suggestions?
Thanks!

Connection is made through gertboard: you can find schematics here: https://dl.dropboxusercontent.com/u/7414592/JavaME/Assembled%20Gertboard%20Schematics.pdf
Specifically, I left unconnected (i.e. oopen) P1/CON2 jumper and connected RPi Pin3 (marked as GPIO2 on J2 connector of my board, while it is marked as GPIO0 on schematics, due to pinout revision #2 against #1.
It seems that the problem comes from Pullup setting, that could cause flickering when floating...

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'''bold text'''

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<blockquote>
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>> would like to understand how sql server 2008 deals with cascade updates <<
Your posting has a number of conceptual errors.
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emp_name VARCHAR(25) NOT NULL,
CREATE TABLE Health_Plan
(health_plan_acct CHAR(20) NOT NULL PRIMARY KEY,
emp_id CHAR(20) NOT NULL
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ON DELETE CASCADE,
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PinListener triggers many times with same value, then segfaults

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