Is there a way to signal the difference between new tags and existing tags when asking a question?
I got burned when asking this question. My internets are slow here so the Ajaxy-popup with suggested tags was too late to suggest tags based on the first few letters I typed. And when I pressed space it automatically converted my tag to a nice tag-image-thingy suggesting it was correct and existing.
Some visual feedback in the Tag-Label-Thingy would have alerted me that I was creating new tags instead of reusing existing ones. (A color? A check mark? Different border?)