In the 10 days since its public release, MSIE8 has made a run up the charts. Courtesy of the great folks at StatCounter and their public analytics data, this growing browser share for MSIE8 can be easily followed.

In the US, prior to its release, MSIE8 RC1 was in sixth position behind even the old battleship Firefox 2.0, but ahead of Chrome 1.0.

In the week following its release, MSIE has quickly surpassed Firefox 2.0 browser share in the US. I am not really sure who these Firefox 2.0 users are, but they and the MSIE6 users must be found and encouraged to immediately upgrade.

The values for the first week don’t tell the entire story. As it enters its second week of general availability, MSIE8 continues to increase its share of the browser market, moving into fourth place in StatCounters US stats, overtaking Safari 3.2.

What does t his mean? While it still has a long way to go before it comes close to approaching even the dinosaur, MSIE6, it has to be said that this growth in MSIE8 browser share has occurred without the use of Windows Update. People are making a conscious decision to switch to and use MSIE8.

Site and application designers will need to take heed – MSIE8 compatibility initiatives will have to be in place yesterday rather than some vague time in the future.