diff -u -r -N mysql-connector-java-3.1.12/src/com/mysql/jdbc/ResultSet.java /opt/mysql-connector-java-3.1.12/src/com/mysql/jdbc/ResultSet.java
--- mysql-connector-java-3.1.12/src/com/mysql/jdbc/ResultSet.java	2005-12-01 02:02:01.000000000 +0000
+++ /opt/mysql-connector-java-3.1.12/src/com/mysql/jdbc/ResultSet.java	2005-12-12 14:55:09.000000000 +0000
@@ -3945,12 +3945,22 @@
 
 		this.wasNullFlag = false;
 
+		Field f = this.fields[columnIndex];
+
 		// TODO: Truncation warning?
-		switch (this.fields[columnIndex].getMysqlType()) {
+		switch (f.getMysqlType()) {
 		case MysqlDefs.FIELD_TYPE_DOUBLE:
 			return (short) getNativeDouble(columnIndex + 1);
 		case MysqlDefs.FIELD_TYPE_TINY:
-			return getNativeByte(columnIndex + 1);
+			byte tinyintVal = getNativeByte(columnIndex + 1);
+
+			if (!f.isUnsigned() || tinyintVal >= 0) {
+				return tinyintVal;
+			}
+
+			short asShort = tinyintVal;
+			asShort += 256;
+			return asShort;
 		case MysqlDefs.FIELD_TYPE_SHORT:
 		case MysqlDefs.FIELD_TYPE_YEAR:
 			byte[] bits = (byte[]) this.thisRow[columnIndex];