Which MySQL version do you use for development?

3.23.xx
3% (2 votes)
4.0.xx
0% (0 votes)
4.1.xx
5% (3 votes)
5.0.xx
64% (37 votes)
5.1.xx
19% (11 votes)
6.0.xx
5% (3 votes)
bzr repository
2% (1 vote)
Third party branch
2% (1 vote)
Total votes: 58