My new banner

Well I thought i had got my banner sorted. It looks ok on my computer and on other computers in my house but I have just had a message that it is too long for the screen. Just out of interest I would like to know if anyone elses computer is showing it too long. If so it looks like i am going to have to play again to get it sorted. This is sooo frustrating

Update: I have now made my banner smaller as other people are seeing it run off the screen. Didn't want it this small but can't think of anything else to do at the moment.
Thanks for those that replied