'setup_objects' has the wrong structure

[Bjarne Søegaard]

I have very recently installed MySql 5.6 including the workbench and I succeeded in creating tables via the modeler etc. I also managed to make small JEE web project that included one of the tables. It worked.
Now when I start MySQL it gives all these messages

2015-10-06 20:51:49 3704 [ERROR] Native table 'performance_schema'.'cond_instances' has the wrong structure
2015-10-06 20:51:49 3704 [ERROR] Native table 'performance_schema'.'events_waits_current' has the wrong structure
2015-10-06 20:51:49 3704 [ERROR] Native table 'performance_schema'.'events_waits_history' has the wrong structure
2015-10-06 20:51:49 3704 [ERROR] Native table 'performance_schema'.'events_waits_history_long' has the wrong structure
....
and many more like it.

I did previously have problems that was solved by deleting the ib_log files.

But now I get these strange errors. They seem to have come when I started my computer up again after having succeeded in reading out some data from the base to the web.
This does not seem to be a very robust base :)
any help is really appreciated as I cannot get anywhere with the project before this is solved.