diff --git a/libraries/liblmdb/Makefile b/libraries/liblmdb/Makefile
index 5f8ef64461..bca5cd3819 100644
--- a/libraries/liblmdb/Makefile
+++ b/libraries/liblmdb/Makefile
@@ -41,7 +41,7 @@ install: $(ILIBS) $(IPROGS) $(IHDRS)
 	for f in $(IDOCS); do cp $$f $(DESTDIR)$(prefix)/man/man1; done
 
 clean:
-	rm -rf $(PROGS) *.[ao] *.so *~ testdb
+	rm -rf $(PROGS) *.[ao] *.[ls]o *~ testdb
 
 test:	all
 	rm -rf testdb && mkdir testdb
diff --git a/libraries/liblmdb/lmdb.h b/libraries/liblmdb/lmdb.h
index bdbb0b909b..408b6ed0ea 100644
--- a/libraries/liblmdb/lmdb.h
+++ b/libraries/liblmdb/lmdb.h
@@ -1025,9 +1025,9 @@ int  mdb_txn_renew(MDB_txn *txn);
 	 * After a successful commit the
 	 * handle will reside in the shared environment, and may be used
 	 * by other transactions. This function must not be called from
-	 * multiple concurrent transactions. A transaction that uses this function
-	 * must finish (either commit or abort) before any other transaction may
-	 * use this function.
+	 * multiple concurrent transactions in the same process. A transaction
+	 * that uses this function must finish (either commit or abort) before
+	 * any other transaction in the process may use this function.
 	 *
 	 * To use named databases (with name != NULL), #mdb_env_set_maxdbs()
 	 * must be called before opening the environment.  Database names
@@ -1270,10 +1270,9 @@ int  mdb_get(MDB_txn *txn, MDB_dbi dbi, MDB_val *key, MDB_val *data);
 	 *		LMDB does nothing else with this memory, the caller is expected
 	 *		to modify all of the space requested.
 	 *	<li>#MDB_APPEND - append the given key/data pair to the end of the
-	 *		database. No key comparisons are performed. This option allows
-	 *		fast bulk loading when keys are already known to be in the
-	 *		correct order. Loading unsorted keys with this flag will cause
-	 *		data corruption.
+	 *		database. This option allows fast bulk loading when keys are
+	 *		already known to be in the correct order. Loading unsorted keys
+	 *		with this flag will cause a #MDB_KEYEXIST error.
 	 *	<li>#MDB_APPENDDUP - as above, but for sorted dup data.
 	 * </ul>
 	 * @return A non-zero error value on failure and 0 on success. Some possible