diff --git a/src/libstd/smallintmap.rs b/src/libstd/smallintmap.rs
index fe481c5c47e..8dbd6347876 100644
--- a/src/libstd/smallintmap.rs
+++ b/src/libstd/smallintmap.rs
@@ -6,7 +6,7 @@ import core::option;
 import core::option::{some, none};
 
 // FIXME: Should not be @; there's a bug somewhere in rustc that requires this
-// to be.
+// to be. (#2347)
 type smallintmap<T: copy> = @{mut v: [mut option<T>]};
 
 #[doc = "Create a smallintmap"]
diff --git a/src/libstd/sort.rs b/src/libstd/sort.rs
index 45e591bbaba..7e16578fd9c 100644
--- a/src/libstd/sort.rs
+++ b/src/libstd/sort.rs
@@ -141,7 +141,7 @@ fn qsort3<T: copy>(compare_func_lt: le<T>, compare_func_eq: le<T>,
     qsort3::<T>(compare_func_lt, compare_func_eq, arr, i, right);
 }
 
-// FIXME: This should take lt and eq types
+// FIXME: This should take lt and eq types (#2348)
 #[doc = "
 Fancy quicksort. Sorts a mut vector in place.
 
diff --git a/src/libstd/tempfile.rs b/src/libstd/tempfile.rs
index 91b03ea6b71..8a12b17512b 100644
--- a/src/libstd/tempfile.rs
+++ b/src/libstd/tempfile.rs
@@ -9,7 +9,7 @@ fn mkdtemp(prefix: str, suffix: str) -> option<str> {
     let mut i = 0u;
     while (i < 1000u) {
         let s = prefix + r.gen_str(16u) + suffix;
-        if os::make_dir(s, 0x1c0i32) {  // FIXME: u+rwx
+        if os::make_dir(s, 0x1c0i32) {  // FIXME: u+rwx (#2349)
             ret some(s);
         }
         i += 1u;