Same here can't create or save. using the MW_057DR2_alpha_1 with itemtablechanges then i saw you mention update so i downloaded the latest dumpeditem.sql and made a seperate DB for it. bad news there all items have no values when i did that good thing i made a second db
also tried the backup db option it freezes for a second and then closes its self and the .sql it makes is 0 bytes.