Spinoff of bug 668574 for Thunderbird where we will no longer support Win XP SP1 and below.
Bug 668574 will likely be landing on today (February 2nd). Since Thunderbird uses the same common code as Firefox it will also pick up the change and the Thunderbird installer will refuse to install on Win2K.
Created attachment 593958 [details] [diff] [review] The fix Ports the string change across.
Comment on attachment 593958 [details] [diff] [review] The fix Seems good. rs=me.