Green Hopper introduced issue fields such as Sprint and Rank do not show up when an issue is accessed via the IDE connector using the remote API. Moreover, these fields get reset when an issue is updated using the IDE connector. This causes a previously assigned Sprint issue to fall off the Sprint which can be very disconcerting.
Jira (v5.1.2)
Atlassian Connecotr for Eclipse (v3.0.7)
Atlassian Jira Connector (v3.0.7)