diff --git a/cups-snmp-quirks.patch b/cups-snmp-quirks.patch
new file mode 100644
index 0000000..81639bb
--- /dev/null
+++ b/cups-snmp-quirks.patch
@@ -0,0 +1,86 @@
+diff -up cups-1.4.3/backend/snmp-supplies.c.snmp-quirks cups-1.4.3/backend/snmp-supplies.c
+--- cups-1.4.3/backend/snmp-supplies.c.snmp-quirks	2009-11-20 01:27:57.000000000 +0000
++++ cups-1.4.3/backend/snmp-supplies.c	2010-04-13 11:54:13.508023630 +0100
+@@ -38,6 +38,15 @@
+ 
+ 
+ /*
++ * Printer quirks...
++ */
++
++/* The prtMarkerSuppliesLevel values are percentages, not levels
++ * relative to the stated capacity. */
++#define QUIRK_LEVEL_IS_PERCENTAGE	(1<<0)
++
++
++/*
+  * Local structures...
+  */
+ 
+@@ -57,6 +66,12 @@ typedef struct				/**** Printer state ta
+   const char	*keyword;		/* IPP printer-state-reasons keyword */
+ } backend_state_t;
+ 
++typedef struct				/**** Printer quirk table ****/
++{
++  const char	*description;		/* hrDeviceDescr */
++  int		quirks;			/* quirks (bitmask) */
++} printer_quirk_t;
++
+ 
+ /*
+  * Local globals...
+@@ -68,6 +83,7 @@ static int		current_state = -1;
+ static int		charset = -1;	/* Character set for supply names */
+ static int		num_supplies = 0;
+ 					/* Number of supplies found */
++static int		quirks = 0;	/* Printer quirks */
+ static backend_supplies_t supplies[CUPS_MAX_SUPPLIES];
+ 					/* Supply information */
+ 
+@@ -153,6 +169,11 @@ static const backend_state_t const print
+ 			  { CUPS_TC_outputFull, "output-area-full-warning" }
+ 			};
+ 
++static const printer_quirk_t const printer_quirks[] =
++			{
++			  { "Officejet Pro 8500 A909g", QUIRK_LEVEL_IS_PERCENTAGE }
++			};
++
+ 
+ /*
+  * Local functions...
+@@ -208,6 +229,9 @@ backendSNMPSupplies(
+       if (i)
+         *ptr++ = ',';
+ 
++      if (quirks & QUIRK_LEVEL_IS_PERCENTAGE)
++	supplies[i].max_capacity = 100;
++
+       if (supplies[i].max_capacity > 0)
+         sprintf(ptr, "%d", 100 * supplies[i].level / supplies[i].max_capacity);
+       else
+@@ -366,6 +390,7 @@ backend_init_supplies(
+   current_state = -1;
+   num_supplies  = -1;
+   charset       = -1;
++  quirks	= 0;
+ 
+   memset(supplies, 0, sizeof(supplies));
+ 
+@@ -404,6 +429,15 @@ backend_init_supplies(
+ 
+   fprintf(stderr, "DEBUG2: hrDeviceDesc=\"%s\"\n", description);
+ 
++  for (i = 0; i < sizeof (printer_quirks) / sizeof (printer_quirks[0]); i++)
++  {
++    if (!strcmp (description, printer_quirks[i].description))
++    {
++      quirks = printer_quirks[i].quirks;
++      break;
++    }
++  }
++
+  /*
+   * See if we have already queried this device...
+   */
diff --git a/cups.spec b/cups.spec
index d822f37..53e9ae1 100644
--- a/cups.spec
+++ b/cups.spec
@@ -8,7 +8,7 @@
 Summary: Common Unix Printing System
 Name: cups
 Version: 1.4.3
-Release: 2%{?dist}
+Release: 3%{?dist}
 License: GPLv2
 Group: System Environment/Daemons
 Source: http://ftp.easysw.com/pub/cups/%{version}/cups-%{version}-source.tar.bz2
@@ -56,6 +56,7 @@ Patch29: cups-0755.patch
 Patch30: cups-EAI_AGAIN.patch
 Patch31: cups-str3505.patch
 Patch32: cups-str3541.patch
+Patch33: cups-snmp-quirks.patch
 
 Patch100: cups-lspp.patch
 
@@ -218,6 +219,7 @@ module.
 %patch30 -p1 -b .EAI_AGAIN
 %patch31 -p1 -b .str3505
 %patch32 -p1 -b .str3541
+%patch33 -p1 -b .snmp-quirks
 
 %if %lspp
 %patch100 -p1 -b .lspp
@@ -521,6 +523,9 @@ rm -rf $RPM_BUILD_ROOT
 %{php_extdir}/phpcups.so
 
 %changelog
+* Tue Apr 13 2010 Tim Waugh <twaugh@redhat.com> 1:1.4.3-3
+- Handle SNMP supply level quirks (bug #581825).
+
 * Wed Mar 31 2010 Tim Waugh <twaugh@redhat.com> 1:1.4.3-2
 - Another BrowsePoll fix: handle EAI_NODATA as well (bug #567353).