While 0.12.4 woks perfectly with radeonsi (free driver for radeon HD7xxx and higher) 0.13 does not display stars. Neither with QT 5.1 from official site nor 5.2 form Debian Sid. Mesa versions I've tried are git snapshots of 10.0, 10.1 and 10.2. I don't remember whether I was using Mesa 9.2. With non free driver from AMD there no problems, afair.
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Any logs? We are not telepaths.
See log.txt here: pastebin.com/rteDxXJf
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