It's really annoying that my wp sometimes "automatically" switch to a default theme. I did nothing to the server and it just happened.
Some months ago I found that it's possibly due to the missing of a file (of the customized theme) but this time, no action was being done to my server. Before I went to bed yesterday everything went well but this morning one of my reader told me it's a messy. Then I found the theme has been switched.
Anyone can give me some tips, thanks in advance.