I tried running the installer on my Ubuntu 11.04 x64 desktop and received the following error message:
sudo dpkg -i passwordsafe-ubuntu-0.5.0BETA.i686.deb
dpkg: error processing passwordsafe-ubuntu-0.5.0BETA.i686.deb (--install):
package architecture (i386) does not match system (amd64)
Errors were encountered while processing:
Let me know if you have any suggestions, thanks!