Maybe this isn't a bug, just a known limitation?
I was trying to parallelize generation of a large number of small pdfs (to separate files using separate PdfSurfaces). This all works if I do this in series, but generates empty (or corrupted) pdfs as soon as I try to do a Parallel.ForEach on these. There's no crash or error, it just doesn't work. Any ideas if this can be supported? Enhanced?