I had the same problems with an HP LaserJet 1150 in a F15 i686 and a F14 i686.
For F15: hplip-3.11.7-2.fc15.i686
For F14: hplip-3.11.7-2.fc14.i686
If you try adding blank lines at the beginning of the document, they are wiped out too.
If I print from the F14 to a printer connected to an F13 box using hplip-3.11.5-1.fc13.i686 through the network, it prints well.
I had the same problems with an HP LaserJet 1150 in a F15 i686 and a F14 i686.
For F15: 11.7-2. fc15.i686
hplip-3.
For F14: 11.7-2. fc14.i686
hplip-3.
If you try adding blank lines at the beginning of the document, they are wiped out too.
If I print from the F14 to a printer connected to an F13 box using hplip-3. 11.5-1. fc13.i686 through the network, it prints well.