Pulse explorer doesn't start because libxpcom.so is missing in ubuntu, what can I do?
This is a common issue with eclipse applications in ubuntu, and the problem is related to Mozilla XULRunner runtime package that's used by them. The solution is to install a XULRunner version that's lower than 2.0. Before Ubuntu 11.10 you can find that package in the official repositories, so all you need to do is open synaptics and look for "xulrunner 1.9" and install it. But if you are using Ubuntu 11.10 or higher you will need to look for the deb package to install it. You can find the package for your ubuntu version and architecture here.
Héctor - Pulse Support