I'm developing a new site and have had Slideshow installed successfully for the past few weeks. I updated to 2.2.1 and suddenly the images in my slideshow have shrunk! Instead of 202 pixels wide, they are now 83 pixels wide. The original image files are 202-pixel-wide PNGs and the Media Library shows the images 202 pixels wide.
The site: http://kentfeeds.org
One of the images: http://kentfeeds.org/wp-content/uploads/2013/01/product-spotlight-sample-02.png