Great plugin! One observation in WordPress 3.1 when using:
[wp-blogroll notitle=1]
Empty <h2> tags still appear with notitle=1. Can work around by putting the following rule in css:
.linkcattitle { display:none; }
This method works, but it enabled comments on pages that were disabled in the control panel.
If this is a persistent problem in a Plesk hosting environment, you’ve most likely left PHP Safe Mode enabled in the Web Host Settings for your domain.