What ISP's are people using and rough locations/exchanges?

I'm in Scotland but it happens regardless of location, ISP or BT Exchange. We sometimes still have Cisco PIX or Windows Server on sites and have ended up reverting to those which work flawlessly. The 2820 seems worse than 2800s we have but some 2800s with latest firmware have started doing it. Never has any issue with 2600s but no longer have any.

I have this on a 2900 on a remote site.

I'll do some testing at some point and post back.

I have exactly the same problem as the OP. 2600's are still fine (I have 20+) no problems at all. However all the 2800's I have show the same problem (10 of them all on the latest firmware). I know I didnt have this problem on one of the older firmware's but I cant remember which one.

It has come to the point where I have to start looking for alternative routers (suggestions welcome), especially now I am seeing the 2820's have the same issue.

yip you are seeing same thing as me. seems worse with 2820 than the 2800s but have plenty 2800 doing it. 2600 all fine.
been having a look at Zyxel - Not sure what a comparable model would be though? I never liked them much but have a few out there for SDSL connections which are pretty rock solid.

I have a case open with Draytek at the moment however it is going nowhere fast! I will keep you all posted.

Out of interest does anyone know which was the last firmware for the 2800 where this was working OK?