Dell1250c paper size problem after last version firmware update?!

Hello,

i have "sleep" problem whit Dell 1250c and reading many forum posts and updated firmware version to latest.

when update is done i got another problem - randomly (when i printed *.pdf files) got error message for unexpected paper size?!

paper size is set to A4 plain (printer + file)but printer shows me folio 8x13" plain or letter ... i am confused!

already bought 12 of this printers...any solution?

Thank you in advance!