XiTi Monitor's latest survey results points to December's strong growth across the globe, especially in South America and Oceania.
In the US, XiTi reports a December gain of nearly one percentage point to 21% of the market. In Europe, December growth was also strong, putting Firefox at 28%. Australia and New Zealand were the big Firefox winners in December gaining 1.4 percentage points and becoming the first region to break the 30% mark with a Firefox market of 31.1%.
Consistent with their previous study, Firefox migration to the latest version is still dramatically outpacing IE migration to the latest version. According to XiTi, 93% of Firefox users are using Firefox 2 while only 47% of IE users are on 7. (BTW, my calculations suggest something closer to 97% of Firefox users on Firefox 2)
Until they publish in English, here's a Google translation.