I noticed something similar. When I use the GUI everything works and I
can export to pdf however, when I use the command line and type lyx -e
pdf2 Doc_LP10_31.lyx, lyx does it's business (no errors when using -dbg)
but the pdf file does not appear in the directory containing
Doc_LP10_31.pdf
Cheers,
Jouke
PS. I'm very happy with the new interface!!