DewKnight

Did support put a file called php.ini in your folder when they fixed it last time? Can you check if there is a file there?

Another things you might do is make another test blog in another folder on your domain. Just upload the files and create a new database for it and see if you get blank comments with that one as well.

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Kya

Thanks for the reply. Yes, I do have a file called php.ini should I post what it has inside?

Surpass did install another WordPress for me and I have now moved this to the main directory because I thought it had solved the problem, but it still happens with this one as well. ):

Kya

I am still having this problem, but I thought occured to me and I feel folish for not looking sooner but I didn't realise. I decided to look in the error_log (duh!) and the following are the most common;

There are literally HUNDREDS of these errors all with different dates, going right up to today.

This is the next common one with hundreds as well, but less common then the first error. Also, it has many different dates.

I have also noticed a few other strange errors that appear and certainly around times that blank comments have appeared:

I have also noticed that sometimes after this error, the database dies, so that is a little scary. Is this a hack attempt? Or one that is making the server crash and comments not get through?

Also sometimes after the above error there is also another error that appears like this:

Then a lot of weird characters appear and it ends with

It makes me a little nervous, but at the same time I feel I am closer to resolving the issue. I think I will install that plugin bad behaviour, and contact support again!

Or if anyone has any ideas and tips that would be greatly appreciated.