The LDAP engine is unable to process multiple modify requests to a single entity if they occur on the same page. It is simple enough to make the request handler map entity IDs to a list of requests rather than just a single request, but the real problem is merging the changes on the change report (which deals with IConnectorEntitys). Perhaps the effects of the requests should be merged at a level higher than this.
There are currently no known systems that will send requests like this, so this is not urgent.
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