Here you can find the list of requests for features to be added to the bug tracker, this will in time be split into implemented, binned, planned to be added, feel free to add your request.
Main Requirements
Add Bug
Comment on Bug
Close Bug
Attachments (Patch + Screenshot)
Priority to fix
Related Permission Controls for Comment, Close.
User levels
History, changed who/when, the bug report itself and relevant files/modules
Multiple category bugs (ex. documentation and streams) each with own status
Multiple typed bugs (ex. a feature request for the streams extension)
Ability to hide email address (obfuscated or otherwise) from public view
RSS Feed and Email Subscription
When a bug is reclassified, email the appropriate lists (without requiring a comment)
Bug Categories by extension, and/or tags for notification (email) purposes, (e.g. I want to be notified of new bugs in the PCRE extension)
Secondary Requirements
Gravtar/pavatar support?
User profiles
Data push to IRC
No captcha for people logged in with @php.net
No captcha for people who confirmed (via email) their account
Preview bug report (before submit) option
Ability to save searches to make quick searches + More organized search page
List dependent bugs
VCS (Versioning Control System, e.g. CVS and SVN) integration
Script to push commit message into bugtracker which gets appended as comment to bug
Linking to SVN & CVS revision
Link from VC to bugtracker (see trac)
Allow users to vote on bugs
Pluggable user authentication
REST-interface to extract information from the bugtracker (e.g. to package homepage, IRC)
Be able to see CVS commits regrading a bug report based on an special ID in the commit log message