Bukkit

What steps will reproduce the problem?
1. Just send a message with /t with a quote ( ' )
2. Look your server send errors
3. Cry

What is the expected output? What do you see instead?
Nothing

What version of the product are you using?
1.4.7

Do you have an error log of what happened?
2013-03-18 15:06:08 [INFO] p02030507111317 issued server command: /t p02030507111317 j'attends
2013-03-18 15:06:25 [SEVERE] com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'attends', '1363615568', '23', '1011', '63', 'world', '977'),
('Gallarion1', 'nul' at line 2
2013-03-18 15:06:25 [SEVERE]     at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
2013-03-18 15:06:25 [SEVERE]     at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
2013-03-18 15:06:25 [SEVERE]     at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
2013-03-18 15:06:25 [SEVERE]     at java.lang.reflect.Constructor.newInstance(Constructor.java:532)
2013-03-18 15:06:25 [SEVERE]     at com.mysql.jdbc.Util.handleNewInstance(Util.java:407)
2013-03-18 15:06:25 [SEVERE]     at com.mysql.jdbc.Util.getInstance(Util.java:382)
2013-03-18 15:06:25 [SEVERE]     at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1052)
2013-03-18 15:06:25 [SEVERE]     at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3593)
2013-03-18 15:06:25 [SEVERE]     at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3525)
2013-03-18 15:06:25 [SEVERE]     at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1986)
2013-03-18 15:06:25 [SEVERE]     at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2140)
2013-03-18 15:06:25 [SEVERE]     at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2620)
2013-03-18 15:06:25 [SEVERE]     at com.mysql.jdbc.StatementImpl.executeUpdate(StatementImpl.java:1662)
2013-03-18 15:06:25 [SEVERE]     at com.mysql.jdbc.StatementImpl.executeUpdate(StatementImpl.java:1581)
2013-03-18 15:06:25 [SEVERE]     at me.arno.blocklog.util.Query.insert(Query.java:320)
2013-03-18 15:06:25 [SEVERE]     at me.arno.blocklog.util.Query.insert(Query.java:298)
2013-03-18 15:06:25 [SEVERE]     at me.arno.blocklog.schedules.SaveSchedule.run(SaveSchedule.java:73)
2013-03-18 15:06:25 [SEVERE]     at java.lang.Thread.run(Thread.java:636)
2013-03-18 15:06:25 [SEVERE]     at org.bukkit.craftbukkit.v1_4_R1.scheduler.CraftTask.run(CraftTask.java:53)
2013-03-18 15:06:25 [SEVERE]     at org.bukkit.craftbukkit.v1_4_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:53)
2013-03-18 15:06:25 [SEVERE]     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
2013-03-18 15:06:25 [SEVERE]     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
2013-03-18 15:06:25 [SEVERE]     at java.lang.Thread.run(Thread.java:636)
2013-03-18 15:06:30 [INFO] CONSOLE: Stopping the server..

Please provide any additional information below.
Just sanitize your commands.