diff -Naur boinc-6.2.18/client/hostinfo_unix.C boinc-6.2.18-mp/client/hostinfo_unix.C
--- boinc-6.2.18/client/hostinfo_unix.C	2008-08-25 20:29:18.000000000 +0000
+++ boinc-6.2.18-mp/client/hostinfo_unix.C	2008-11-03 17:50:19.000000000 +0000
@@ -248,7 +248,7 @@
         // we need to find the right ac adapter first
         DirScanner dir("/proc/acpi/ac_adapter/");
         while (dir.scan(ac_name)) {
-            if ((ac_name.c_str()==".")||(ac_name.c_str()=="..")) continue;
+            if ((strcmp(ac_name.c_str(),".")==0)||(strcmp(ac_name.c_str(),"..")==0)) continue;
 
             // newer ACPI versions use "state" as filename
             sprintf(ac_state, "/proc/acpi/ac_adapter/%s/state", ac_name.c_str());