I saw this link to this article over at Opera Watch, even though Daniel didn’t comment on it.
Apparently a flaw in Netscape 8 caused it to mis-report itself as Mozilla Firefox. This in turned caused the stats for Netscape to fall, and the stats for Firefox to increase.
Thats ok… Opera reports itself as IE by default. So we have kind of the same situation there. Opera was considering a change to the default reporting, and hopefully we’ll see that in the next major release. 