Old screenshots will be deleted when they haven't been accessed for a while. How long exactly depends on the number of new screenshots per day.
42.
Line #%(line_number)d is too long (%(char_count)d characters).
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That's not a problem with your page but a side effect of the multi-page merging. The screenshots are taken one screen at a time, and then merged together to produce a tall screenshot.
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Thank you for supporting the Browsershots project!
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URL
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Screenshot request group
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Also, if your requested configuration is too specific (e.g. specific Flash or Java version) there may not be matching screenshot factories all the time. Try the <em>Don't care</em> setting for quicker results.
48.
I don't have Python on my computer. Can I still run a ShotFactory?