NW6 SP3 (problem also occoured with SP2)
2 x Servers in cluster (LON-FS01 & LON-FS02)

Macs (OS X) can attach to LON-FS02 and mount volumes on the desktop.
But if
they try to attach to LON-FS01, the mouse pointer stays as an hour
glass and
the server stops responding to clients.

It doesn't abend, I can flick from screen to screen. Monitor shows
workthread is server02, not high util though.
If I try to load something (edit for example) the console locks (it
to be waiting for something - like when timesync isn't working).

If I ctrl+alt+esc then down the server, it just sits there.

Anyone experienced anything like it?