missing float.sty on default install

[Hussein Elgridly]

Hi,

I've come to LyX from the Windows version, and have just installed LyX 
from the Ubuntu repositories. I'm running Ubuntu 8.04, which gave me LyX 
1.5.3. Firing up a .lyx document which I made in Windows, I tried 
exporting to PDF and it complained that I don't have prettyref.sty. I 
put it in the same folder as the .lyx document. Now I've tried again and 
it's complaining about float.sty. I'm under the impression that this is 
a pretty standard package, and on the Windows distribution it'll go off 
to CTAN and get all the styles by itself. This doesn't seem to be 
happening for me. Also, running reconfigure fails - "The system 
reconfiguration has failed. Default textclass is used but LyX may not be 
able to work properly. Please reconfigure again if needed".

This bothers me. I certainly don't want to have to go to CTAN every time 
I want to use a new package, download and install it myself. Has anyone 
seen this before / is there a way to get this working?

Thanks,
-Hussein