Description:
Steps to reproduce:
- create Sync sample project
- open BPEL in editor
- switch to source view
- set a breakpoint to assign element
- switch to design view
- insert Empty activity between Receive and Assign
- switch to source view
Result: The breakpoint moves to the newly created empty element
- add comment line (<!--   -->)after the empty element
- switch to design view and delete Empty activity
- switch to source view
Result: The breakpoint moves to the newly created comment line
-

Evaluation:
We looked at this. It is not a big problem. Actually it only works incorrectly
if you insert the new element directly before the element that has the
pre-existing breakpoint. 

If you add the new element(s) higher up in the process then the breakpoint will
remain with the origianl element as the origianl element is repositioned. That
is the correct behavior. The only time you do not get this behavior is when the
new element is inserted immediately before the breakpoint element.

Workaround:
Remove the breakpoint that has moved to wrong line and add a new one.