There is a little scary bug in 1.1.6 (maybe 1.1.7 too?) related to saving Design/Content pages ( SQL tables 'contents' and 'content_descriptions').
It happens this way. Sometimes, when updating existing pages contents, occasionally you may have a field error related to certain field's validators like:
Required Data has not been entered. Check for field errors!
Content Title must be between 2 and 64 characters!
Content must be more than 1 characters!
etc..
So, you follow the instruction and modify the Title (or the Content, etc) properly and hit on Save... and after it says something like "Success: You have modified a page!", what you see is Content Manager blank, cause the page you were editing just disappeared from both Admin and Store altogether!
You start checking db and discover, the page is still present in the 'content_descriptions' and 'pages' and 'page_descriptions' tables, but was wiped out from the 'contents'. You can insert into 'contents' values manually in mysql and you will be able to see the page but the bug is still there, and intermittently hampers editing pages deleting them from 'contents'
Basically, when any error (be it the 64 characters Title limit; or Content > 1 character; or any other error like the Allowed memory size from
http://forum.abantecart.com/index.php/topic,1285.0.html ) occurs, it somehow interrupts the page editing process in the Content Manager, drops the reference to 'contents' table stored in the memory, and after pressing on Save to the bottom it is gone.