Henry Hartley wrote:
One thing I notice is that the objectcache table seems to be non-readable in the file generated by mysqldump, as well. Is that table MEANT to be backed up?
No. The objectcache table is a cache of php objects commonly used (that's why you see binary). Just truncate it. It will slowly readd things there as they are used, which could have been retrieved for that cache, but that's all.