Just to let you know...

After uploading the latest definitions (yesterday, 16 July), I run a check on my WinXP Pro SP3 and... it stopped responding (freezes) at: 3424/273127: Win32.GGDoor

Since then, I reinstalled the Spybot-S&D 1.6 released version (clean install in the safe mode) and everything is working fine. Hopefully, there will be no problems in the normal mode as well.