PCSP 1.2 has been running here perfectly for the last month or two on i586 SMP.
I've had no problems at all that I have attributed to it.
As for "clean", I couldn't comment, but it's definitely SMP safe.
-- ---- ---- ---- David Woodhouse, Robinson College, CB3 9AN, England. (+44) 0976 658355 dwmw2@cam.ac.uk http://dwmw2.robinson.cam.ac.uk finger pgp@dwmw2.robinson.cam.ac.uk for PGP key.