一个xorg log的问题

xinyoo

退出X以后，系统log:

396 Warning: font renderer for ".pcf" already registered at priority 0
397 Warning: font renderer for ".pcf.Z" already registered at priority 0
398 Warning: font renderer for ".pcf.gz" already registered at priority 0
399 Warning: font renderer for ".snf" already registered at priority 0
400 Warning: font renderer for ".snf.Z" already registered at priority 0
401 Warning: font renderer for ".snf.gz" already registered at priority 0
402 Warning: font renderer for ".bdf" already registered at priority 0
403 Warning: font renderer for ".bdf.Z" already registered at priority 0
404 Warning: font renderer for ".bdf.gz" already registered at priority 0
405 Warning: font renderer for ".pmf" already registered at priority 0
406 Warning: font renderer for ".pcf" already registered at priority 0
407 Warning: font renderer for ".pcf.Z" already registered at priority 0
408 Warning: font renderer for ".pcf.gz" already registered at priority 0
409 Warning: font renderer for ".snf" already registered at priority 0
410 Warning: font renderer for ".snf.Z" already registered at priority 0
411 Warning: font renderer for ".snf.gz" already registered at priority 0
412 Warning: font renderer for ".bdf" already registered at priority 0
413 Warning: font renderer for ".bdf.Z" already registered at priority 0
414 Warning: font renderer for ".bdf.gz" already registered at priority 0
415 Warning: font renderer for ".pmf" already registered at priority 0

不影响使用，就是不知道怎么回事，字体有错误？