Continuing the discussion from Slugs that start with numbers parsed as IDs:
Then I’ll feel better as a total novice not being able to figure it out. 
Thanks!
A total edge case since it matters (best I can tell) for keeping old URLs working on imported data.
I suppose I should re-post in praise (and now I have to since topic got closed), but dang, being able to redirect /oldforum/the-slug-they-used to http://discoursehost/t/the-slug-they-used and have it just work is freaking magic.