HP DV6 same problem. I do not think the bug is due to gnome-screenshot but it a problem of the keyboard map. STAMP is not recognized at all. First I noticed I was not able to use altgr+STAMP REISUB anymore, now the screenshot.
I have changed the shortcut for the screenshot to alt+h for instance and it works fine.
If I open system settings->keyboard and then I click on the small keyboard icon I notice that the stamp button is not highlighted when I press it.
The keyboard and Sysrq ware working fine on Ubuntu 13.04 for sure
HP DV6 same problem. I do not think the bug is due to gnome-screenshot but it a problem of the keyboard map. STAMP is not recognized at all. First I noticed I was not able to use altgr+STAMP REISUB anymore, now the screenshot.
I have changed the shortcut for the screenshot to alt+h for instance and it works fine.
If I open system settings->keyboard and then I click on the small keyboard icon I notice that the stamp button is not highlighted when I press it.
The keyboard and Sysrq ware working fine on Ubuntu 13.04 for sure