diff --git a/BitKeeper/etc/logging_ok b/BitKeeper/etc/logging_ok
index 9237eea21c4..e4de8c6ebf2 100644
--- a/BitKeeper/etc/logging_ok
+++ b/BitKeeper/etc/logging_ok
@@ -8,6 +8,7 @@ Miguel@light.local
 Sinisa@sinisa.nasamreza.org
 WAX@sergbook.mysql.com
 acurtis@pcgem.rdg.cyberkinetica.com
+acurtis@xiphis.org
 administrador@light.hegel.local
 ahlentz@co3064164-a.rochd1.qld.optusnet.com.au
 akishkin@work.mysql.com
diff --git a/mysql-test/r/ctype_collate.result b/mysql-test/r/ctype_collate.result
index bc77e9c2362..cdf890f2c6c 100644
--- a/mysql-test/r/ctype_collate.result
+++ b/mysql-test/r/ctype_collate.result
@@ -535,6 +535,19 @@ s2 CHAR(5) COLLATE latin1_swedish_ci);
 SELECT * FROM t1 WHERE s1 = s2;
 ERROR HY000: Illegal mix of collations (latin1_german1_ci,IMPLICIT) and (latin1_swedish_ci,IMPLICIT) for operation '='
 DROP TABLE t1;
+CREATE TABLE t1
+(s1 CHAR(5) COLLATE latin1_german1_ci,
+s2 CHAR(5) COLLATE latin1_swedish_ci,
+s3 CHAR(5) COLLATE latin1_bin);
+INSERT INTO t1 VALUES ('a','A','A');
+SELECT * FROM t1 WHERE s1 = s2;
+ERROR HY000: Illegal mix of collations (latin1_german1_ci,IMPLICIT) and (latin1_swedish_ci,IMPLICIT) for operation '='
+SELECT * FROM t1 WHERE s1 = s3;
+s1	s2	s3
+SELECT * FROM t1 WHERE s2 = s3;
+s1	s2	s3
+a	A	A
+DROP TABLE t1;
 SET NAMES latin1;
 CREATE TABLE t1 
 (s1 char(10) COLLATE latin1_german1_ci,
diff --git a/mysql-test/r/query_cache.result b/mysql-test/r/query_cache.result
index 5fe00e70d3d..5385eec6da3 100644
--- a/mysql-test/r/query_cache.result
+++ b/mysql-test/r/query_cache.result
@@ -299,6 +299,8 @@ select UNIX_TIMESTAMP() from t1;
 UNIX_TIMESTAMP()
 select USER() from t1;
 USER()
+select CURRENT_USER() from t1;
+CURRENT_USER()
 select benchmark(1,1) from t1;
 benchmark(1,1)
 explain extended select benchmark(1,1) from t1;
diff --git a/mysql-test/r/union.result b/mysql-test/r/union.result
index 96baf36d151..c140ecd26e1 100644
--- a/mysql-test/r/union.result
+++ b/mysql-test/r/union.result
@@ -1103,7 +1103,7 @@ count(*)
 drop table t1;
 create table t2 (
 a char character set latin1 collate latin1_swedish_ci,
-b char character set latin1 collate latin1_bin);
+b char character set latin1 collate latin1_german1_ci);
 create table t1 as
 (select a from t2) union
 (select b from t2);
diff --git a/mysql-test/t/ctype_collate.test b/mysql-test/t/ctype_collate.test
index 3599beeacc4..b65067a36cf 100644
--- a/mysql-test/t/ctype_collate.test
+++ b/mysql-test/t/ctype_collate.test
@@ -158,6 +158,18 @@ SELECT * FROM t1 WHERE s1 = s2;
 DROP TABLE t1;
 
 
+CREATE TABLE t1
+(s1 CHAR(5) COLLATE latin1_german1_ci,
+ s2 CHAR(5) COLLATE latin1_swedish_ci,
+ s3 CHAR(5) COLLATE latin1_bin);
+INSERT INTO t1 VALUES ('a','A','A');
+--error 1267
+SELECT * FROM t1 WHERE s1 = s2;
+SELECT * FROM t1 WHERE s1 = s3;
+SELECT * FROM t1 WHERE s2 = s3;
+DROP TABLE t1;
+
+
 #
 # Test that optimizer doesn't use indexes with wrong collation
 #
diff --git a/mysql-test/t/query_cache.test b/mysql-test/t/query_cache.test
index b0148a689af..ad36d8b425a 100644
--- a/mysql-test/t/query_cache.test
+++ b/mysql-test/t/query_cache.test
@@ -184,6 +184,7 @@ select LAST_INSERT_ID() from t1;
 select RAND() from t1;
 select UNIX_TIMESTAMP() from t1;
 select USER() from t1;
+select CURRENT_USER() from t1;
 select benchmark(1,1) from t1;
 explain extended select benchmark(1,1) from t1;
 show status like "Qcache_queries_in_cache";
diff --git a/mysql-test/t/union.test b/mysql-test/t/union.test
index 94cbd71c00c..b0446e1ea4a 100644
--- a/mysql-test/t/union.test
+++ b/mysql-test/t/union.test
@@ -641,7 +641,7 @@ drop table t1;
 
 create table t2 (
 a char character set latin1 collate latin1_swedish_ci,
-b char character set latin1 collate latin1_bin);
+b char character set latin1 collate latin1_german1_ci);
 --error 1271
 create table t1 as
 (select a from t2) union
diff --git a/sql/item.cc b/sql/item.cc
index 3b87e5ee2cf..ffde92c4214 100644
--- a/sql/item.cc
+++ b/sql/item.cc
@@ -474,8 +474,17 @@ bool DTCollation::aggregate(DTCollation &dt, uint flags)
 	set(0, DERIVATION_NONE);
 	return 1;
       }
+      if (collation->state & MY_CS_BINSORT)
+      {
+        return 0;
+      }
+      else if (dt.collation->state & MY_CS_BINSORT)
+      {
+        set(dt);
+        return 0;
+      }
       CHARSET_INFO *bin= get_charset_by_csname(collation->csname, 
-					       MY_CS_BINSORT,MYF(0));
+                                               MY_CS_BINSORT,MYF(0));
       set(bin, DERIVATION_NONE);
     }
   }
diff --git a/sql/item_create.cc b/sql/item_create.cc
index c0361c928be..2b12a1310b9 100644
--- a/sql/item_create.cc
+++ b/sql/item_create.cc
@@ -306,6 +306,7 @@ Item *create_func_current_user()
   char buff[HOSTNAME_LENGTH+USERNAME_LENGTH+2];
   uint length;
 
+  thd->lex->safe_to_cache_query= 0;
   length= (uint) (strxmov(buff, thd->priv_user, "@", thd->priv_host, NullS) -
 		  buff);
   return new Item_string(NullS, thd->memdup(buff, length), length,
diff --git a/sql/sql_udf.cc b/sql/sql_udf.cc
index 05df069d69a..661bf6e8197 100644
--- a/sql/sql_udf.cc
+++ b/sql/sql_udf.cc
@@ -526,8 +526,11 @@ int mysql_drop_function(THD *thd,const LEX_STRING *udf_name)
   tables.real_name= tables.alias= (char*) "func";
   if (!(table = open_ltable(thd,&tables,TL_WRITE)))
     goto err;
-  if (!table->file->index_read_idx(table->record[0],0,(byte*) udf_name->str,
-				   (uint) udf_name->length,
+  table->field[0]->store(udf_name->str, udf_name->length, system_charset_info);
+  table->file->extra(HA_EXTRA_RETRIEVE_ALL_COLS);
+  if (!table->file->index_read_idx(table->record[0], 0,
+				   (byte*) table->field[0]->ptr,
+				   table->key_info[0].key_length,
 				   HA_READ_KEY_EXACT))
   {
     int error;