Mistakes character code for hashtag

Hi,
in tweets, some punctuation gets converted into a character code, for example &#39 for an apostrophe. The plugin doesn’t recognize it, and it thinks it is an ampersand followed by the hashtag #39. Any way to fix this/am I doing to something wrong? The feed is embedded in a php block with

echo do_shortcode('[twitter-feed username="RUTorch" num="15"]');

Any help would be much appreciated. Other than that, I really like the plugin; it’s an extremely simple way to embed a twitter feed for a client who isn’t a programmer and may want to edit it in the future.
Thanks!

http://ww.wp.xz.cn/extend/plugins/simple-twitter-feed/