Charts for released versions do not work properly

I've only checked this on JIRA Studio, but it happens on both 3.3 and the latest 3.7 (which is not released to Studio customers yet).

After having released a version, go to the released charts (for example http://jira.example.com/secure/ArchiveChartBoard.jspa?selectedProjectId=10020 ).
Once there, try to change the release version or the chart displayed. The javascript fails and nothing happens, although an error is logged in both IE and Firefox.

Error messages:
On 3.3:

Firefox3:
Error: B is null
Source File: https://jira1.example.com/download/resources/com.pyxis.greenhopper.jira:greenhopper-webactions/js/lib/combined/combined-boards-3.3.js
Line: 1

IE:
Line: 2
Char: 49248
Error: Object required
Code: 0
URL: https://jira.example.com/secure/ArchiveChartBoard.jspa?selectedProjectId=10020

On 3.7:

Error: d is null
Source File: http://jira.example.com/download/resources/com.pyxis.greenhopper.jira:greenhopper-webactions/js/combined-boards-3.7-studio-1-SNAPSHOT.js
Line: 1

I don't have IE log data for 3.7, sorry.