Problems with mounting disks & usb flash

[O. Sinclair]

I have put a mail out on this already (re usb devices not accessible) 
but realise the problem is more complicated than just USB drives. So 
here goes;

I have a strange problem since a week or so. I am running Kubuntu 6.06.1 
and have a disk partitioned in several "bits" like /, Home and swap. 
There is also an ntfs partition and a vfat (small rescue thing).

Now if I go to "Storage Media" and click on any of the ntfs or vfat I 
get the following message;
"Could not mount device. The reported error was: mount: /dev/sda2 
already mounted or /media/sda2 busy. mount: according to mtab, /dev/sda2 
is already mounted on /media/sda2"

More or less the same error happens if I insert a USB flash memory or a 
USB camera.
In all cases I can get around it by "going root" and use eg Krusader in 
root mode. I can then access the disk/usb/camera.

but a while ago I just accessed these no problems and when a USB or 
camera was inserted I could access as "a normal user".

Anyone has ideas?

Sinclair