I’m also interested in finding this out. My template depends on usual sequential IDs.
I’m getting exactly the same problem. If anyone already found a solution, please let me know.
I’m not sure if it’s WordPress URL structures, but it has been 2 months since my site is online and Google seems to have an unfounded wish to avoid it. I’ve tried, as the guy above said, the “?p=237882” URL as well as the /this-is-a-post.htm thing.
None worked =(