In JIRA 4.2, we changed how timetracking works with regards to being able to edit Original and Remaining Estimates separately.

JIRA's IssueService provides an API to assist in updating an issue's fields - IssueInputParameters. This API was not updated when the timetracking changes were made. Thus, with the current version of this interface, it is not easy to make those issue field updates (some overriding is required).

It'd be helpful for plugin developers/consumers of this API if it was brought up-to-date. I've already done this within GreenHopper - we just need to push the changes back into JIRA.