Correct. The LZW algorithm is now entirely unencumbered by Unisys-owned patents. There is a question as to whether one of IBM's patents may also cover its use, but that patent also expires soon, in 2 years time IIRC, and I doubt that IBM will do anything about it anyway.

For static images there is a better solution than .gif anyway. Shame that .png doesn't do animations.
_________________________
Mk2a 60GB Blue. Serial 030102962 sig.mp3: File Format not Valid.