Finally I have the answer for anyone interested.
My ISP had blocked the User Agent string in the specific IE10 version with the problem on my Virtual Server due to a DDoS brute-force attack (targeting Wordpress installations) in early April 2013.
They didn't tell me then or I would have known immediately what the problem was.
My ISP had blocked the User Agent string in the specific IE10 version with the problem on my Virtual Server due to a DDoS brute-force attack (targeting Wordpress installations) in early April 2013.
They didn't tell me then or I would have known immediately what the problem was.