[Plugin: Twitter Tools] couple errors

I have, randomly upon loads, been having these errors show up both in the Dashboard and the publicly viewable portions of my site.

Warning: md5() expects parameter 1 to be string, array given in /home/******/public_html/wp-content/plugins/twitter-tools/twitter-tools.php on line 674

Catchable fatal error: Object of class stdClass could not be converted to string in /home/******/public_html/wp-content/plugins/twitter-tools/twitter-tools.php on line 681

The problem is that they are showing the directories, and that they are showing at all. This is a pretty bare install of WP with minimal plug-ins installed and a simple theme on the site. This site is more function than form and for good reason.

Twitter Tools does work, and I enjoy being able to add a Twitter hash to the post when it gets published, but these errors are making me think of pulling the plug-in completely and going with some other solution.

Any suggestions? I have already reinstalled the plug-in various times.