Possible Duplicate:
How do I resolve unmet dependencies?
When I try to install thunderbird-trunk from the Ubuntu Mozilla Daily PPA, I get:
Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation:
The following packages have unmet dependencies:
thunderbird-trunk: Depends: libindicate5 but it is not installable
Depends: libdbusmenu-gtk4 but it is not installable or libdbusmenu-gtk3 but it is not installable<p>E: Broken packages</p>
This is very strange as I installed it last week and it worked fine.
libdbusmenu-gtk#(either 3 or 4) to see why they cannot be installed? – Thomas Ward Jul 14 '11 at 17:46