Hello glu... I am having the same trouble with FireGPG being unable to access the IPC. Although I am not aware of any errors with XPCOM.
FireGPG works fine on my Ubuntu machine but on my windows machine it fails to access the IPC library.
WinXP SP3, intel x86 32 bit
Firefox 3.0.7
gpg (GnuPG) 1.4.9 (Gpg4win 1.1.4)
I tested this by using a fresh profile in firefox <via "--profileManager"> with no addons installed, same results.
On my regular profile, my only addons are CookieCuller and Downloadthemall. I have never, ever, ever touched or heard of FireFTP.
If I go to "Tools / Error Console" this console does not appear to report anything when I open the FireGPG options page.
Asking FireGPG to use the older version of the IPC library, via options checkbox, does not appear to have any effect.
If you have a way to display debug data in this addon I would like to try that. I don't know if I want to go as far as installing a build environment on this machine however.
Thank you the_glu,
Linny^