This plugin is a great idea and something I really need. However, it doesn't quite work... it seems to be skipping entries.
If I for example choose entry 1744, I would expect the previous entry to be 1742 and next 1753 - those are the previous and next entry in the WordPress post listing. I have edit privileges for both, as I'm the author of both.
Instead I get 849 as previous and 1801 as next. If I click myself to the previous entry, the next entry isn't 1744, but 1599.
This is odd and makes this highly useful and necessary plugin unusable, which is a pity. This should really be a standard feature in WordPress.