I think I might be experiencing this as well.
When I activate the plugin and go to convoke.info/stuff I get the godaddy 404 error page.
With the plugin disabled, convoke.info/category/stuff works fine.
The reason I’m chiming in on this thread is because convoke.info USED to be multisite/network. When I was developing this new theme (and testing out the no category base plugin) on a DIFFERENT test site (NOT network/mutlisite/mu) it was working fine.
Hopefully I’m being clear.
This issue is affecting me as well (if I’m understanding it correctly). If the number of words/characters in the post is LESS than the number you specify in the plugin settings, you still get the ellipsis AND a read more link (provided you have the read more link option turned on).
In contrast, WP’s default excerpt function doesn’t add […] if the_excerpt actually returns the whole post.
Would love to have a workaround, even if it meant digging in the code a bit.