diff -Nru libproxy-0.4.11.orig/libproxy/modules/config_kde4.cpp libproxy-0.4.11/libproxy/modules/config_kde4.cpp
--- libproxy-0.4.11.orig/libproxy/modules/config_kde4.cpp	2012-07-05 18:50:06.000000000 +0200
+++ libproxy-0.4.11/libproxy/modules/config_kde4.cpp	2013-04-22 13:29:01.905639524 +0200
@@ -64,7 +64,8 @@
 				};
 				// The result of toLatin1() is undefined for non-Latin1 strings.
 				// However, KDE saves this entry using IDN and percent-encoding, so no problem...
-				response.push_back(string(prxy.toLatin1().data()));
+				// Workaround: since recent kde versions a space is used instead of ':'
+				response.push_back(string(prxy.replace(' ',':').toLatin1().data()));
 				break;
 			case 2: // Use a manual PAC
 				// The result of toLatin1() is undefined for non-Latin1 strings.