When i start supend to disk or ram via the KPowersave Menu, KPowersave complains that some external media cannot be unmounted. This message appears since the last update of KPowersave this week.
But on my machine there is no external stuff mounted. 
And this message is also wrong, if the nfs-share is mounted, because it exists a pm-hook for autofs. 

# mount
/dev/hda5 on / type ext3 (rw,acl,user_xattr)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
debugfs on /sys/kernel/debug type debugfs (rw)
udev on /dev type tmpfs (rw)
devpts on /dev/pts type devpts (rw,mode=0620,gid=5)
/dev/hda6 on /home type xfs (rw)
securityfs on /sys/kernel/security type securityfs (rw)
automount(pid3511) on /nfs type autofs (rw,fd=4,pgrp=3511,minproto=2,maxproto=4)

Perhaps KPowersave has a problem with the automount entry.

The error message is:
Could not umount external media before suspend/standby. 
(Reason: An unknown error occured)
Would you like to continue suspend/standby anyway? 
(Warning: Continue suspend can cause data loss!)