diff -Nru gdb-7.0.1/gdb/thread.c gdb-7.0.1-1/gdb/thread.c
--- gdb-7.0.1/gdb/thread.c	2009-09-13 17:28:28.000000000 +0100
+++ gdb-7.0.1-1/gdb/thread.c	2010-02-03 17:01:26.000000000 +0000
@@ -311,6 +311,18 @@
   return NULL;
 }
 
+struct thread_info *
+find_thread_lwp (int num)
+{
+  struct thread_info *tp;
+
+  for (tp = thread_list; tp; tp = tp->next)
+    if (tp->ptid.lwp == num)
+      return tp;
+
+  return NULL;
+}
+
 /* Find a thread_info by matching PTID.  */
 struct thread_info *
 find_thread_ptid (ptid_t ptid)
@@ -1164,11 +1176,19 @@
 do_captured_thread_select (struct ui_out *uiout, void *tidstr)
 {
   int num;
+  char *tidstring=(char *)tidstr;
   struct thread_info *tp;
 
-  num = value_as_long (parse_and_eval (tidstr));
-
-  tp = find_thread_id (num);
+  if (tidstring[0] == '%')
+  {
+    num = value_as_long (parse_and_eval ((void *)(tidstring+1)));
+    tp = find_thread_lwp (num);
+  }
+  else
+  {
+    num = value_as_long (parse_and_eval (tidstr));
+    tp = find_thread_id (num);
+  }
 
   if (!tp)
     error (_("Thread ID %d not known."), num);