Is anyone else who uses it having problems with the Worldpay since the change to RBSWorldpay?

Not that we have noticed. The payment urls werent changed just logos and descriptions - so far.

We also have not seen any issues with Worldpay since the changes.

There are some new technical changes announced to be affective 18th August. The link to the News pages is
http://www.rbsworldpay.com/support/bg/index.php?page=news&c=UK
which gives guidance.Ill copy this to support.

Looking at this again, because of security issues affecting Internet Explorer 8 RBSWP are suggesting a different server for log in.
 
The details are at
http://www.rbsworldpay.com/support/bg/index.php?page=news⊂=xss&c=UK#pptech
 
At the bottom of the page they suggest changing the submission URL from
Old URL: https://select.worldpay.com/wcc/purchase
to
New URL: https://secure.wp3.rbsworldpay.com/wcc/purchase
 
Ive passed this to support.