Transactions not ACID compliant?

Hello,

I ran into a problem when testing MariaDB with my application. Transactions do not work as expected. To reproduce I opened two connections to the database and entered the following statements:

1. connection 1: START TRANSACTION
2. connection 2: START TRANSACTION
3. connection 1: SELECT * FROM table WHERE field1=1; # SHOWS field2=0
4. connection 2: SELECT * FROM table WHERE field1=1; # SHOWS field2=0
5. connection 1: UPDATE table SET field2=1 WHERE field1=1;
6. connection 2: UPDATE table SET field2=1 WHERE field1=1; # this shows 0 rows affected
7. connection 1: COMMIT;
8. connection 2: COMMIT; # this should fail if I understand ACID right

Am I missing something or is this a bug?

Regards,
Volker