diff -r 93b982ccede2 -r 5daf16870df6 src/gui/painting/qcups.cpp
--- a/src/gui/painting/qcups.cpp	Mon Jun 21 22:38:13 2010 +0100
+++ b/src/gui/painting/qcups.cpp	Thu Jul 22 16:41:55 2010 +0100
@@ -343,7 +343,8 @@
     if (!isAvailable())
         return false;
     const char *ppdFile = _cupsGetPPD(printerName);
-    unlink(ppdFile);
+    if (ppdFile)
+        unlink(ppdFile);
     return (ppdFile != 0);
 }