Redmine

Unable to update customised fields.
This is only occurring using the 'Task' tracker. Customised fields in the Bug tracker, record data normally.
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Steps to reproduce:

1. Open New Issue
2. Select 'Task' from the trackers list
3. Update mandatory fields including custom fields (Addition to Scope; Bug Type; Review)
4. Click submit
5. 3 custom fields data is reset to defaults (blank)
   Throws no error.
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   Environment Deets:

Operating System
Ubuntu Linux 10.04 LTS

Database version
MySQL Ver 5.1.62-0ubuntu0.10.04.1 for debian-linux-gnu on i486 ((Ubuntu))

Ruby version
ruby 1.8.7 (2010-01-10 patchlevel 249) [i486-linux]

Rails version
Rails 2.3.14

Redmine version
1.4.1.stable

Web server info
Apache 2.2.14-5ubuntu8.9
Passenger 3.0.2

SCM binary version
git version 1.7.0.4

More information
deployer@redmine:/var/www/redmine.previousnext.com.au/current$ RAILS_ENV=production ruby script/about

About your application's environment
Ruby version              1.8.7 (i486-linux)
RubyGems version          1.4.2
Rack version              1.1.3
Rails version             2.3.14
Active Record version     2.3.14
Active Resource version   2.3.14
Action Mailer version     2.3.14
Active Support version    2.3.14
Application root          /var/www/redmine.previousnext.com.au/releases/20120507110721
Environment               production
Database adapter          mysql
Database schema version   20120301153455

About your Redmine plugins
Redmine Github Hook plugin                                     0.1.1
Timesheet Plugin                                               0.6.0
Boards watchers management and sticky priority levels add-on   0.1.3
Redmine Light Box plugin                                       0.0.1
Redmine Backlogs                                               v0.9.3