Poor performance after setcap

[Metalgrid]

Hello!
I'm using an application that sends pings along other stuff and it's working great after adding raw socket capabilities as instructed from the wiki.

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sudo setcap cap_net_raw+epi /usr/bin/wine-preloader
sudo setcap cap_net_raw+epi /usr/bin/wineserver

After issuing the above commands it works great, but for some strange reason the performance in World of Warcraft dropped down to a couple of FPS.
After removing the capabilities with

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sudo setcap cap_net_raw-epi /usr/bin/wine-preloader
sudo setcap cap_net_raw-epi /usr/bin/wineserver

the performance is back to the normal 60 FPS.

System info:

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Slackware64 14.1
wine-1.7.15 (self-built, Wine 64 enabled, apps are 32bit)
winetricks not used

Any hints on how to debug the issue are welcome. Thanks!

[dimesio]

Possibly related to this bug: http://bugs.winehq.org/show_bug.cgi?id=35291.