Voting starts in March for the Drupal Association Board election.
If you are using colorbox module then you have to stay with the 7.14 or older versions because as its clarified in colorbox page Form support is removed:
If you absolutely want to continue using the form support you need to stay with 7.x-1.x.
More specific the 7.14 and older versions because the 7.15 nor supports it (documentation misunderstanding).
In the meanwhile i can think of two work arounds:
- Check the current colorbox version in line 1409 (newsletter.module)
- Make use of the colorbox module in another way, if exists