I know, I know! I am running this plugin on a development version of WordPress, but my issues as far as I can tell are with the actual plugin and not WP 2.5-beta1.
The issues are as follows:
1) UH-OH the Robots.txt file is not being created. However, the plugin reports that it has been created. When I hover over the link to see where it has been created and then check on the server the file is not there. I do not think this is a file permissions issue on my server, although I may be wrong.
1.1) I am not sure about this, but shouldn't the Robots.txt file be created in the root of the blog address instead of the WordPress address?
2) NICE TO HAVE naming conventions between the plugins menu and the settings/options menu remain the same for this plugin.