New Version has been released: 1.6.1. It fixes the problem for the webservers without support for short php tags <? ?> and adds ability to post either full post or excerpt of the post.

Changes:
= 1.6.1 =
* Improvement – New posting format: %TEXT% – Inserts the excerpt of your post. %FULLTEXT% – Inserts the body(text) of your post.
* Bug fix – Activation Problem “unexpected $end” for servers with no support  for short php tags <? ?>.

You can download it from NextScripts or directly from WordPress.org