I love the flexibility and power of this plugin, but I found a couple of minor issues:
First, the [post_excerpt] does not play well with UTF-8*. It severs double-byte characters, resulting in an unreadable character in the end of the excerpt, just before the ellipsis. For example, “Αθήνα…” becomes “Αθήν�…”
*UTF-8 uses an adaptable system with multiple bytes for each letter, which to old software would look like two (or more) individual ASCII characters. So when you truncate the text, you run the risk of separating a two-byte pair, resulting in an unreadable character.
The reason why you did not notice this issue with latin languages, is because in the latin alphabet only the first byte is used.
You can find more information here: http://en.wikipedia.org/wiki/Utf-8
A better approach would be to set the excerpt limit to words, not characters, by counting spaces. This way no words would be truncated, and the UTF-8 issue would be solved.
Secondly, it does not show categories from custom taxonomies, even when you select the custom taxonomy post type in the menu.
For example, I use All-in-one Event Calendar, which creates a custom taxonomy for its events and categories. Although I can select the custom post type in the Advanced Post List Settings page, the custom categories are not shown in the category list.