I am using civicrm_api3 class with the REST api, and Options do not get handled correctly because the code does not allow for an array within the overall parameters array.
I have it fixed (it is a very simple fix), but I don't know who I should let know.
The procedure for reporting bugs is detailed at https://civicrm.org/bug-reporting . This goes through verifying and reproducing the bug, and then it can be added on the issue tracker.
If you have a patch, you can submit a pull request on GitHub (often against https://github.com/civicrm/civicrm-core) with a reference to the bug report.
