I am using windows xp x86, wamp, apache2, php 5.3 x86, eclipse php, and xdebug, running on localhost as both a virtualhost and an https virtualhost
eclipse version i
Right now my best guess as to what caused this is having two projects in the same workspace with different vhosts at the same ip.
Well I am debugging as well two projects, in the the same Eclipse-workspace with different VHosts at the same IP and use apache.
And I am not experiencing your problems.
Though my apache and stuff is located in a vmware-emulation of debian and my Eclipse resides in WinXP.
Best
Raffael