Did you try a brand new profile, with only NoScript and no other add-ons, as Giorgio requested?
What does "sm+fx+fn" mean? I see only 2.6.5.7.xpi as the name of the .xpi installer. (It's now 2.6.5.8)
noscript-2.6.5.7-sm+fx+fn.xpi
What does "sm+fx+fn" mean? I see only 2.6.5.7.xpi as the name of the .xpi installer. (It's now 2.6.5.8)