xulrunner-1.9.1 does not respect system font rendering settings

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Binary package hint: xulrunner-1.9.1

I don't know much about xulrunner, so please correct if i am wrong about anything.

I realized that when I installed xulrunner-1.9.1, applications that are using gtkmozembed do not render fonts according to system font settings. For example, Exaile uses "/usr/lib/xulrunner-1.9.1b4pre/libxpcom.so" when xulrunner-1.9.1 is available and fonts in the embedded browser look really different from other fonts in the system. When xulrunner-1.9.1 is not installed, Exaile uses the regular XUL + XPCOM from "/usr/lib/xulrunner-1.9.0.10/libxpcom.so" and fonts are ok. I am attaching a screenshot (with xulrunner-1.9.1 and xulrunner-1.9) so that you can see the difference.