This happened to me a couple of days ago. I don't remember what thread it was or what day, but I was in the middle of reading a post and it suddenly
redirected and said that the site had malware or something to that effect. I was like whoa..wth??? It only happened that one time so far.
Running it on mobile and aside from the mobile version sucking (not being able to view posted images and not really seeing the whole board i believe)
it's fine. I am good with php if that's what the site is coded in. Course i'd have to look the code over from the phone lol!