[pdftex] 1px is not 1bp which seems to contradict the pdftex manual

[Karl Berry]

    Subject: [pdftex] 1px is not 1bp which seems to contradict the pdftex manual

I admit I have never had occasion to use px dimensions. What are they
intended for?

Anyway, it does look like a rounding error somewhere. I'll ask Thanh.
Thanks for the report.

    I don’t know if other engines support px.

I don't believe so. --best, karl.