Sorry for the delay (svn troubles, mainly).
This is a bugfix release, and should address issues on the back end, particularly the erroneous firing of the pdf creation when saving posts and other odd happenings when in the admin area.
In addition, the code for this build has been significantly tidied using WP-phptidy (see my site for details concerning my build of this tool).
If you are experiencing weird issues when the plugin is enabled and you are working in the admin area, I strongly advise upgrading to this release. There are no added features beyond what is available in 1.0.4, however.