Thank you for making great plugin.
I found a bug on /wp-twitter-widget.php.
<backticks>
601 'year' => 60 * 60 * 24 * 365, // 31,536,000 seconds
602 'month' => 60 * 60 * 24 * 7, // 2,592,000 seconds
603 'week' => 60 * 60 * 24 * 7, // 604,800 seconds
</backticks>
60 * 60 * 24 * 7 should be 60 * 60 * 24 * 30 on line 602.
