diff --git a/checkin_notes b/checkin_notes
index 2cd24e2f66..61339f7c56 100644
--- a/checkin_notes
+++ b/checkin_notes
@@ -6751,3 +6751,11 @@ David  3 Oct 2011
     sched/
         sched_types.h
         sched_send.cpp
+
+David  3 Oct 2011
+    - scheduler: record VirtualBox version # in the host table
+
+    sched/
+        handle_request.cpp
+    lib/
+        coproc.cpp,h
diff --git a/lib/coproc.cpp b/lib/coproc.cpp
index 0e73f666a1..17aed5d75d 100644
--- a/lib/coproc.cpp
+++ b/lib/coproc.cpp
@@ -47,6 +47,7 @@
 #include "error_numbers.h"
 #include "filesys.h"
 #include "parse.h"
+#include "str_replace.h"
 #include "util.h"
 
 #include "coproc.h"
@@ -244,24 +245,22 @@ int COPROC::parse_opencl(XML_PARSER& xp) {
 }
 
 void COPROCS::summary_string(char* buf, int len) {
-    char bigbuf[8192], buf2[1024];
+    char buf2[1024];
 
-    strcpy(bigbuf, "");
+    strcpy(buf, "");
     if (nvidia.count) {
         int mem = (int)(nvidia.prop.dtotalGlobalMem/MEGA);
         sprintf(buf2, "[CUDA|%s|%d|%dMB|%d]",
             nvidia.prop.name, nvidia.count, mem, nvidia.display_driver_version
         );
-        strcat(bigbuf, buf2);
+        strlcat(buf, buf2, len);
     }
     if (ati.count) {
         sprintf(buf2,"[CAL|%s|%d|%dMB|%s]",
             ati.name, ati.count, ati.attribs.localRAM, ati.version
         );
-        strcat(bigbuf,buf2);
+        strlcat(buf, buf2, len);
     }
-    bigbuf[len-1] = 0;
-    strcpy(buf, bigbuf);
 }
 
 int COPROCS::parse(XML_PARSER& xp) {
diff --git a/lib/coproc.h b/lib/coproc.h
index 1bd446b805..da24e29c8b 100644
--- a/lib/coproc.h
+++ b/lib/coproc.h
@@ -348,7 +348,7 @@ struct COPROCS {
         std::vector<std::string> &warnings
     );
     int parse(XML_PARSER&);
-    void summary_string(char*, int);
+    void summary_string(char* buf, int len);
 
     // Copy a coproc set, possibly setting usage to zero.
     // used in round-robin simulator and CPU scheduler,
diff --git a/sched/handle_request.cpp b/sched/handle_request.cpp
index 56f6557e64..8d926e1d1e 100644
--- a/sched/handle_request.cpp
+++ b/sched/handle_request.cpp
@@ -499,6 +499,10 @@ static int modify_host_struct(HOST& host) {
     g_request->coprocs.summary_string(buf2, sizeof(buf2));
     strlcpy(host.serialnum, buf, sizeof(host.serialnum));
     strlcat(host.serialnum, buf2, sizeof(host.serialnum));
+    if (strlen(host.virtualbox_version)) {
+        sprintf(buf2, "[vbox|%s]", host.virtualbox_version);
+        strlcat(host.serialnum, buf2, sizeof(host.serialnum));
+    }
     if (strcmp(host.last_ip_addr, g_request->host.last_ip_addr)) {
         strncpy(host.last_ip_addr, g_request->host.last_ip_addr, sizeof(host.last_ip_addr));
     } else {