Software update problems

When i today tried to update my software, a problem came up.. After the program downloaded the file, a box came up, where it said ( i have a german version, so i try to translate): "The update could not been checked and extracted" - Check if you have permissions to write in /tmp/501/TemporaryItems/com.apple.SoftwareUpdate

But when i tried to go to the adress, it said "file doesnt exist"

Please help me and thx for your answers

Didnt work for me, but thx for the fast answer

almost the same box again: "The update could not been checked and extracted" - Check if you have permissions to write in /tmp/com.apple.SoftwareUpdate

thx for the answers

I found this one:

http://www.macinblog.com/2004/02/software_update.html

Gonna try it out now.. Hope it helps

Yes, it seems that Xcode uninstalled also tar and gnutar from /usr/bin .
To aviod installing xcode again, i used Pacifist (http://www.charlessoft.com/) to open the installer and to search for "tar & gnutar" manually.. After installing them, software update worked perfect again..

Apple should fix this problem soon

Cheers

-heaven