538845 - OS X System Service called twice when using keyboard shortcut

Status: RESOLVED DUPLICATE of bug 473030

(Firefox :: General, defect)

Description

[slipbox]

User-Agent:       Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_2; en-us) AppleWebKit/531.21.8 (KHTML, like Gecko) Version/4.0.4 Safari/531.21.10
Build Identifier: 3.6rc1 (Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-GB; rv:1.9.2) Gecko/20100105 Firefox/3.6)

Firefox calls the "Make New Slip" System Service twice for application SlipBox.

Reproducible: Always

Steps to Reproduce:
1. (Have SlipBox installed ( http://markusguhe.net/slipbox/ ) and the System Service "Make New Slip" available, including keyboard shortcut.)
2. Select some text on a web page.
3. Call the System Service with its predefined keyboard shortcut cmd-shift-M
Actual Results:  
Firefox calls the system service twice. I verified this by debugging SlipBox's source.

Expected Results:  
The service should be called only once.