Meta Box

Lagging when adding too many fields (I need 40)! Cannot drag/reorder any field because it's too slow. And finally crashed the whole site, could not change or even update field group location in the field group settings...it does not want to update this field anymore and I am locked to 'archive' and cannot even entera prefix (it takes 30 seconds to display it). Also the json exported is not correct and had to modifiy it for missing }}] and so on. I ahd to delete all fields, import and use old metabox versions to make sure, if making sure of anything is the right word.

Hello,
Same issue with hierarchical pages, only solution was not to use metabox to do it and handle my pages hierarchical structure using the post type type SLUG as a repertory name, Prepended permalink structure and Enabling request the post via URL. In that case the rewrite rule works without getting 404 errors for pages that were already fine in this repertory before using metabox for other pages. Trying anything else either makes pages not built with metabox go in 404 or new pages built with metabox go on 404. No way to get both running fine before, now it is ok but required couple of days to get right.

Hello, and how about a way to use validation callback function to do so? I did not figure out a simple way to implement any kind of validation for images (mostyl sizes of course...). Do I havee to wait the ile is loaded and use validation when the whole metabox is saved to database? Not really nice for user to wait final saving to say "hey sorry your image is not right! But I could not tell you before you saved your whole page..."