diff --git a/checkin_notes b/checkin_notes
index 49e5a7a153..b01e0e7357 100644
--- a/checkin_notes
+++ b/checkin_notes
@@ -1315,3 +1315,13 @@ Rom    3 Feb 2012
         async_file.cpp
     win_build/
         boinc_cli.vcproj
+
+David  3 Feb 2012
+	- client: debug async file copy.  Seems to be working.
+
+	client/
+		app.cpp
+		app_start.cpp
+		async_file.cpp
+	lib/
+		common_defs.h
diff --git a/client/app.cpp b/client/app.cpp
index 8a721073fc..de4cc52d38 100644
--- a/client/app.cpp
+++ b/client/app.cpp
@@ -985,6 +985,7 @@ static const char* task_state_name(int val) {
     case PROCESS_ABORTED: return "ABORTED";
     case PROCESS_COULDNT_START: return "COULDNT_START";
     case PROCESS_QUIT_PENDING: return "QUIT_PENDING";
+    case PROCESS_COPY_PENDING: return "COPY_PENDING";
     }
     return "Unknown";
 }
diff --git a/client/app_start.cpp b/client/app_start.cpp
index 57043fd482..2857f19122 100644
--- a/client/app_start.cpp
+++ b/client/app_start.cpp
@@ -570,7 +570,10 @@ int ACTIVE_TASK::start(bool first_time) {
         //
         if (first_time || wup->project->anonymous_platform) {
             retval = setup_file(fip, fref, file_path, true, false);
-            if (retval) {
+            if (retval == ERR_IN_PROGRESS) {
+                set_task_state(PROCESS_COPY_PENDING, "start");
+                return 0;
+            } else if (retval) {
                 strcpy(buf, "Can't link app version file");
                 goto error;
             }
@@ -591,6 +594,7 @@ int ACTIVE_TASK::start(bool first_time) {
             get_pathname(fref.file_info, file_path, sizeof(file_path));
             retval = setup_file(fip, fref, file_path, true, true);
             if (retval == ERR_IN_PROGRESS) {
+                set_task_state(PROCESS_COPY_PENDING, "start");
                 return 0;
             } else if (retval) {
                 strcpy(buf, "Can't link input file");
@@ -1110,12 +1114,13 @@ int ACTIVE_TASK::resume_or_start(bool first_time) {
             sprintf(buf, " (%s)", app_version->plan_class);
         }
         msg_printf(result->project, MSG_INFO,
-            "%s task %s using %s version %d%s",
+            "%s task %s using %s version %d%s in slot %d",
             str,
             result->name,
             app_version->app->name,
             app_version->version_num,
-            buf
+            buf,
+            slot
         );
     }
     return 0;
diff --git a/client/async_file.cpp b/client/async_file.cpp
index 34097eedc7..5dc7b3484e 100644
--- a/client/async_file.cpp
+++ b/client/async_file.cpp
@@ -35,7 +35,8 @@ vector<ASYNC_VERIFY*> async_verifies;
 vector<ASYNC_COPY*> async_copies;
 
 int ASYNC_COPY::init(
-    ACTIVE_TASK* _atp, const char* from_path, const char* _to_path) {
+    ACTIVE_TASK* _atp, const char* from_path, const char* _to_path
+) {
     atp = _atp;
     strcpy(to_path, _to_path);
     in = fopen(from_path, "rb");
@@ -75,6 +76,9 @@ int ASYNC_COPY::copy_chunk() {
     if (n <= 0) {
         // copy done.  rename temp file
         //
+        fclose(in);
+        fclose(out);
+        in = out = NULL;
         retval = boinc_rename(temp_path, to_path);
         if (retval) {
             error(retval);
@@ -88,10 +92,10 @@ int ASYNC_COPY::copy_chunk() {
                 error(retval);
             }
         }
-        remove_async_copy(this);
         return 1;       // tell caller we're done
     } else {
         int m = fwrite(buf, 1, n, out);
+        m = 0;
         if (m != n) {
             error(ERR_FWRITE);
             return 1;
@@ -103,11 +107,11 @@ int ASYNC_COPY::copy_chunk() {
 // handle the failure of a copy; error out the result
 //
 void ASYNC_COPY::error(int retval) {
+    atp->set_task_state(PROCESS_COULDNT_START, "ASYNC_COPY::error");
     gstate.report_result_error(
         *(atp->result), "Couldn't copy file: %s", boincerror(retval)
     );
     gstate.request_schedule_cpus("start failed");
-    remove_async_copy(this);
 }
 
 void remove_async_copy(ASYNC_COPY* acp) {
@@ -117,6 +121,7 @@ void remove_async_copy(ASYNC_COPY* acp) {
             async_copies.erase(i);
             break;
         }
+        i++;
     }
     delete acp;
 }
diff --git a/lib/common_defs.h b/lib/common_defs.h
index ec728ed96d..2b0238b3a5 100644
--- a/lib/common_defs.h
+++ b/lib/common_defs.h
@@ -139,6 +139,8 @@ enum SUSPEND_REASON {
     // process exceeded limits; send "abort" message, waiting to exit
 #define PROCESS_QUIT_PENDING    8
     // we've sent it a "quit" message, waiting to exit
+#define PROCESS_COPY_PENDING    10
+    // waiting for async file copies to finish
 
 // states in which the process has exited
 #define PROCESS_EXITED          2