diff -Naur kdepimlibs-4.5.1/kcal/icalformat_p.cpp kdepimlibs-4.5.1-magellan/kcal/icalformat_p.cpp
--- kdepimlibs-4.5.1/kcal/icalformat_p.cpp	2010-05-27 19:22:10.000000000 +0200
+++ kdepimlibs-4.5.1-magellan/kcal/icalformat_p.cpp	2010-09-27 16:28:42.000000000 +0200
@@ -784,7 +784,7 @@
   if ( att->isUri() ) {
     attach = icalattach_new_from_url( att->uri().toUtf8().data() );
   } else {
-    attach = icalattach_new_from_data ( ( unsigned char * )att->data(), 0, 0 );
+    attach = icalattach_new_from_data ( ( const char * )att->data(), 0, 0 );
   }
   icalproperty *p = icalproperty_new_attach( attach );