I recently had problems completing an online transcation.

Using paypal proceeded normally but stalled at a point where it appeared to redirect me to sagepay resulting in a blank/black screen.

Trying the same transaction using card details alone ended the same way with a redirect to sagepay and a blank screen.

Three different browsers ended with the same result.

The only clue I had with one of the browsers was a problem with a self signed certificate being rejected.

The blunt solution was to switch off pfBlockerNG and the transaction went through fine.

I don't have/haven't had any problems with other online merchants before now.

I've perused the logs and nothing jumps off the page at me.

Any pointers please, as to where I should be looking and how to identify it would be gratefully received.

Thanks,

Paul