I’ve got the same issue. I’m using WP 3.5.1.
- This is for the very first time trying to delete a log entry
- I go into Dashboard | System log
- Click in the check box of the first log entry (ID 1)
- From the ‘Bulk actions’ dropdown select ‘Delete’
- This redirects me to the admin dashboard
- Going back to the System log still shows the log there
- Looking at the entries database table – the row ID 1 is still there
Actually I’ve done further testing and on the second attempt (following the same process above), on delete the page redirects back to itself and the log entry was actually deleted.
In my separate localhost environment it is consistently failing i.e. delete and ‘mark as read’ both redirect to the dashboard and don’t alter the database. You can delete rows by clicking on the ‘Remove all log entries from this category’ link as well as ‘Delete this log category’ link. It is also WP 3.5.1 but is running on a IIS local host.