sudo aptitude install pcb
[sudo] password for user:
Reading Package Lists... Done
Building Dependency Tree       
Reading extended state information      
Initializing package states... Done
Writing extended state information... Done
The following NEW packages will be automatically installed:
  libtk tk 
The following NEW packages will be installed:
  libtk pcb tk 
0 packages upgraded, 3 newly installed, 0 to remove and 0 not upgraded.
Need to get 0B/1656kB of archives. After unpacking 4114kB will be used.
Do you want to continue? [Y/n/?] 
Writing extended state information... Done
Committing changes...
Preparing...                 ################################################################################################### [100%]
file /usr/share/mime/XMLnamespaces from install of pcb-20081128-alt4 conflicts with file from package shared-mime-info-1.1-alt1
file /usr/share/mime/aliases from install of pcb-20081128-alt4 conflicts with file from package shared-mime-info-1.1-alt1
file /usr/share/mime/generic-icons from install of pcb-20081128-alt4 conflicts with file from package shared-mime-info-1.1-alt1
file /usr/share/mime/icons from install of pcb-20081128-alt4 conflicts with file from package shared-mime-info-1.1-alt1
E: Error while running transaction
A package failed to install.