Yes it happens to me quite often Jim.
Coloured bands or sometimes - like transparent double image. I am always careful before commenting because of it. Nothing clears it except to return another time.

Message edited on: 02/22/2005 16:15

And every one said, 'If we only live,
We too will go to sea in a Sieve,---
To the hills of the Chankly Bore!'
Far and few, far and few, Are the lands where the Jumblies live;
Their heads are green, and their hands are blue, And they went to sea in a Sieve.

Edward Lear
http://www.nonsenselit.org/Lear/ns/jumblies.html