When opening any EPS file, fonts look ugly (low resolution). Converting to PDF using ps2pdf solves the font rendering issues. Reproducible: Always Steps to Reproduce: 1. Open EPS file.
Can you please attach the eps file you are using?
Created attachment 83056 [details] One of the EPS files that was used to reproduce the bug. While the bug has been reproduced for multiple EPS files on different machines, this is one example of an EPS file whose font rendering is malfunctioning.
I don't see any problems on my machine, both with okular 0.14.3 from Debian wheezy and with okular from today's git master. With the latter version I do get errors in the console though, so maybe the file is slightly malformed? The error is GPL Ghostscript 9.05: Error: Font Renderer Plugin ( FreeType ) return code = -1 repeated about 25 times.
The problem appears on okular 0.17.0 and is present up to at least 0.17.2 (current version on Arch Linux). It is not present on earlier versions. I have no errors on the command-line whatsoever. I have tested this on multiple files and the result is always the same. If the problem is solved in the git master (which I have not tested), then it means this bug is already fixed.
Created attachment 83059 [details] Sine function plot. Is also badly rendered by okular 0.17.2.
Looks good here. What is your backend? Is it 'ghostscript'? You can find which backend you use in "settings->viewer module settings" (name guessed from the German translation).
Oliver, that won't give you the backend you are using at the moment, for that you need Help -> About backend.
Help -> About Backend says Image Backend version 0.1.1.
*** This bug has been marked as a duplicate of bug 325745 ***