Got this enquiry:

Having terrible trouble with you site, it has started crashing my browser all the time over the last few days, using both firefox and chrome, there muist be some horrible memory problem that might need to be looked at?

Anyone else experiencing difficulties?

Nope, nothing here.

Nah!

No.  Dude probably has an issue with a virus or malware on his system.

Fine here.

...but it's not crashing, just displaying graphics haphazardly and changing with each refresh of the page. I get graphics where only icons should be, the wrong graphics in the wrong place and "interesting" things like that. Sometimes I need to refresh a page a couple of times to get an almost clean display.