It is a known issue with CUPS-1.4.5

http://www.cups.org/str.php?L3535

============================================================

--- scheduler/conf.c	Mon Aug 30 21:18:38 2010

+++ scheduler/conf.c	Wed Oct  3 22:36:53 2012

@@ -540,7 +540,7 @@

   cupsdClearString(&DefaultPaperSize);

-  cupsdSetString(&RIPCache, "8m");

+  cupsdSetString(&RIPCache, "128m");

   cupsdSetString(&TempDir, NULL);

--- scheduler/cupsfilter.c	Tue Mar 30 15:07:33 2010

+++ scheduler/cupsfilter.c	Wed Oct  3 22:37:20 2012

@@ -1218,7 +1218,7 @@

   else

     set_string(&FontPath, CUPS_FONTPATH);

-  set_string(&RIPCache, "8m");

+  set_string(&RIPCache, "128m");

   if ((temp = getenv("CUPS_SERVERBIN")) != NULL)

     set_string(&ServerBin, temp);

--- doc/help/ref-cupsd-conf.html.in	Tue Jul 13 19:43:27 2010

+++ doc/help/ref-cupsd-conf.html.in	Wed Oct  3 22:38:06 2012

@@ -2646,7 +2646,7 @@

 <H3>Examples</H3>

 <PRE CLASS="command">

-RIPCache 8m

+RIPCache 128m

 RIPCache 1g

 RIPCache 2048k

 </PRE>

@@ -2657,7 +2657,7 @@

 memory cache used by Raster Image Processor ("RIP") filters such

 as <CODE>imagetoraster</CODE> and <CODE>pstoraster</CODE>. The

 size can be suffixed with a "k" for kilobytes, "m" for megabytes,

-or "g" for gigabytes. The default cache size is "8m", or 8

+or "g" for gigabytes. The default cache size is "128m", or 128

 megabytes.</P>