Plugin keeps hiding admin bar in single post view

I've had a problem where the WP admin bar is hidden only in single post view. Having turned on and off different plugins to deduce the cause, I found the combination of the permalink mod and Blogger2WP plugin to be the cause.

Have you heard of this bug before? What might I do to correct this problem?

Hi, We never heard such kind of error. As our blogger to WordPress redirection plugin work only for the back-end and not added any code of style for the theme or other plugin. So I don't think it is creating any problem. But still you can check the other plugins or try it by switching on other theme, hope that will be helpful. Thanks, -Nitun