If you are using UVM and you find a bug, there is a formal way to request a fix. The same applies for requesting enhancements. This is done through the eda.org mantis database for VIP. Before you read on, however, please understand that any issues cited on Mantis will be seriously scrutinized by the VIP TSC Accellera committee who owns the UVM. So please absolute due diligence is required to make sure you have a real bug or that your enhancement request will be seriously considered. One suggestion is to use these forums to open up the discussion _before_ submitting anything onto Mantis.