PostGIS is an open-source project, and support is available from a number of sources.
Bugs are reported and managed in a ticket tracker. Please follow these steps:
For the versions where you can replicate the problem, note the operating system, and the output of the SQL
SELECT version() || ' ' || postgis_full_version();
Please, do not use the ticket tracker to ask for help, use the users mailing list for that.
For users who require professional support, development and consulting services, consider contacting any of the following organizations, which have significantly contributed to the development of PostGIS:
Many more PostGIS Service providers can be found using the OSGeo Service Provider search tool.
In addition to commercial and bug squashing support, PostGIS also offers several avenues of free support:
The postgis-users mailing list is a supportive community forum to discuss issues, to learn new techniques, and to share your knowledge with other learners.
For software development questions use postgis-devel.