I recently switched my permalink structure over to:
This has resulted in my attachment IDs not showing up when I go to the attachment/gallery page. That is to say that instead of showing the "id=xx" portion in the URL it merely displays:
For an example please view the following post's 6 image (3 by 3) gallery.
The problem is resolved if I revert to the default permalink structure but i'd like to keep my pretty permalinks. Any ideas?