If you regularly upload large number of images into your WP.com blog using Windows Live Writer (WLW) like me, you may have come across the highly annoying problem I have described in the link below, you'll be pleased to know I have discovered a fix. The problem only occurs if you use WLW *and* adds captions to the images, excessively long parameters are added into Styles that change the image properties.
The fix: a simple cut followed by paste strips resets image styles to WP.com's default.
The blog I need help with is shimworld.wordpress.com.