When I custom my Url with:
/archives/%post_id%.html
And category PREFIX with:
category
And the category url will be http://www.domain.com/category/mycategory/,But this can't work fine. It will be a rewrite loop.
But, In surprize....
When I custom my url without ".html" like this:
/archives/%post_id%/
The category can work very well.
At last, I found the custom url must end with '/'!
I don't know wether it's a bug.
Yours！