Hi.
This is a bug that had been annoying me for quite some time, both with Eclipse 3.7.2 and latest Eclipse 4.2 version : the editor always prefixes my latex-related projects with a "P/" in the Project Explorer panel. By "latex-related project" I mean every project that contain a .tex file (althought it may not have been created as a Texlipse project to begin with). Once I open the .tex file in the editor, there is no way back : my project name appears with the prefix "/P". Thus I believe Texlipse is responsible, but I don't know how to do some further debugging to pinpoint the source of the bug. Something to do with a project.getName() not being called properly I guess.
And for that matters I'm using latest version of Texlipse (from the update site, so 1.5.0 at the time of writing), on Ubuntu Precise 12.04.