I've been experiencing some problems on my blog recently (www.cho-yaba.com).
On August 14, I upgraded WordPress and changed my theme.
There was no problem at all until August 31. This day, all the posts from August 14 to August 31 disappeared (from the database too and only the posts table was affected).
I rewrote all the posts but on September 4 the same thing happened (only posts from August 14 until September 4). Strangely, only one post of August 31 was left (the post that says I lost my posts on August 31 !).
I used a backup of my database to recover the posts and then despite there where previously not in my database, all the posts after August 14 that I had re-written appeared twice !
I wonder where does it come from. My provider, WordPress bug, someone ?
It seems that the only thing I've done is to activate a backup plugin but it was after the first disappearance.
I'm using Performancing for posting, can that be related to my problem ?