I tried hata_ph's download, after loading qt4 and tetex from gslapt and it worked perfectly. I am most happy to get 1.5 as my 5.8 machine uses lyx 1.4 and 1.4.4 is not very good with spreadsheets.
I then most likely screwed up (lived up to my name) as follows. I tried DVI from the lyx view menu and it didn't work. DVI is quite helpful and I use it constantly while in lyx. Rather than reboot (which I now think may have solved the problem) I went back to gslapt, typed DVI in the search bar, and got Aspell-sl and kdegraphics as suggestions. I loaded them both and noted that it then loaded a lot of stuff, including qt3.38b.
DVI still didn't work, so I rebooted and now DVI works, but very slowly and with a very annoying feature (a magnifying box which follows the cursor). I can't turn that box off.