There are a number of niggles I have with the site.
I don't have the extent of Clive's problem, but the login procedure does seem to pop up for no apparent reason from time to time.i understand that if I turn my pc/tablet off, then when I turning back on it usually appears, but if my gear just goes to sleep, I'm still normally logged on when it wakes up again.
Occasionally it seems for some reason the PC site logged it's self off, but that could either be my poor internet connection, or the site may be undergoing admin maintenance.
But what I do find annoying is the login procedure it's self, most sites where it's necessary to login offer ask for site name and password which is reasonable enough, but once filled in on pressing the login button it takes you to the normal home page. PC takes you to an account confirmation page, and then you have to confirm but there's no obvious button, you have to press a text line! Is this page necessary?
As the sites pages load on my android tablet, the page persistently jumps around for several seconds as I assume various adverts load. The number of times I've gone to press a topic and the page jumps so I hit the wrong tab is countless. I have pointed this out in previous versions of the site, and there is no need for it to happen if the space for advertising is allocated and fixed before the page loads.