Master Log Files

[Tedy Aulia]

Hi All,
 
I have found that the binlogfiles have changed their name. Initially the
files were using the name of the server followed by the number i.e.
"foo.###". Since two weeks ago the binlog files have changed to be
"mysql.###". As far as I remember there is no change in my.cnf file so
far. I am using MySQL version 3.23.33
 
Could someone explain why the case I mentioned above has happened? Your
help would be appreciated.
 
Cheers,
Tedy Aulia