Update Issue Field Post-Function using Time Spent does not work

Summary

When using the Update Issue 'Time Spent' post-function, it fails without error and does nothing.

Environment

• PostgreSQL 9.1
• Mac OS X

Steps to Reproduce

1. Copy the default JIRA workflow.
2. Edit a transition (such as start progress) to add an 'Update Issue Field' post-function, setting the Issue Field 'Time Spent' to 5m.
3. Set up a workflow scheme for that issue and assign it to a project.
4. Use the transition that that is supposed to set the time spent.

Expected Results

This Issue Field is not available at all - setting it can mess up GreenHopper's time calculation.

Actual Results

Nothing happens.

Workaround

Disable legacy mode for time tracking.