User-agent: Mozilla Thunderbird 0.8 (Windows/20040913)
One thing might be useful in the notice. What changed? It's hard to tell
without reading the whole thing, and if its been awhile since you read
the old one you have to read it all and determine if it still meets your
privacy concerns. Parsing it all out to determine this is
time-consuming and error-prone. Changes to things like privacy should be
spelled out and not buried in the text.