Thanks for helping,
but I have the same idea about the sheduler and try to fix its configuration. There was indeed a misconfiguration, and the exception frequency goes down rapidly. Now there are still some exceptions and I am quite shure, its not an configuration issue. Maybe, it could be helpful to catch this exception and simply cancle the attempt, to start the job, and write a note in the log. But this helps only, if the reason is a start attempt on a running job. Maybe the core sheduler logic should get some enhancement at this point.
The 'tabs' issue is not clear to me now. I never give Ids for tabs. So this only means, that the system generated duplicate tab ids, this is an issue, which should fixed quickly. Maybe, I have a site with about two hundred pages and now I should open one by one for update, that some kind of horror, sorry.
Fortunately, we have only 40 pages, so we can do it this time, but if the fault comes back in few month?
Hope, some member of the core team will investigate this issue in more details.
The fkc issue is isolated uptil now, so we will have a look at it and report here.
Thanks
Gerhard
PS: Any other ideas out there?