After upgrading my Ubuntu 10.04 LTS I had an error window at every boot up session. The message advised me about:
Could not update ICEauthority file /home/username/.ICEauthority
ICEauthority is the Inter-Client Exchange (ICE) Protocol that allows authentication, negotiation, setting up and taking down connections between programs. In few words, if two programs have the same cookies, they will talk and exchange data through ICEauthority.
To fix this matter open the Terminal and type:
ls -al
Then you find a line similar to this:
-rw——- 1 root root 35226 2011-10-06 00:24 .ICEauthority
This means that your profile (username on a Linux OS) is not allowed to manage ICEauthority and you have to gain full permission to solve the boot up problem:
sudo chown username:username ~/.ICEauthority
Where username is your user profile on Linux.
Then type:
sudo chmod u+rw ~/.ICEauthority
To check if you succeeded, type again:
ls -al
and this time you will find a line like this:
-rw——- 1 username username 35226 2011-10-06 00:24 .ICEauthority
That’s all!
We are sorry for the delay in uploading this new post but we had some technical problems. It happens! This week, in our Linux Page (in Spanish) we have posted a couple of simple but effective tips to choose how many Kernels you want you see when starting up your Ubuntu 8.04. Using Add/Remove Programs it is possible to install the “StartUp Manager” program which allows you to easily choose the number of kernels you prefer. Moreover we have suggested an alternative command line “delete” and “save” solution for the people who prefer to solve this inconvenience without installing new software. Good work! 
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