I tried Google Translate but with no success (as usual). My only futher clue as to the author and his message was that it was coincidental with a search on the term "mouse", and an Internet Explorer history entry showing an extreme interest in an online contest for a year's supply of Fufi paté. So perhaps it means "so long and thanks for all the fish"...
Or perhaps it's just that the computer keyboard is the warmest place in the house.
(His name's Trouble, by the way, and he's a Carmine Cat of 2008.)
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