Version:           svn (using Devel)
OS:                Linux
Installed from:    Compiled sources

I open this bug by a recomendation in bug #160635.
I'll quote some things to explain it:

[quote]
1.- Exclude non user mountable media (that media without user in its mount options line), as it always lists my /boot partition (not mounted automatically) for example, which is not user mountable, only mountable by root. So it is a real nonsense to have that kind of partition listed in there by default which made me to hid it from that list. 
[/quote]

[quote]
for #1 it's indeed because /boot is not mounted on your system. Actually the underlying system doesn't give us the mountpoint of a device if it's not mounted (no we're not reading the fstab).
[/quote]

Maybe it is not regarding only dolphin, as it is KDE wise (new device notifier, ...)