See if the bug and a solution are already known
You can do so in the FAQ
You can also have a look at recent and stickied threads in the Help & Bugs Forum
Where to report bugs
In general, the forum is a bad place to report a bug. Often ofter people will add comments, which confuse others and don't help to understand, whats the real problem. So, if you found a bug in the Spring Engine, please report it to the bug tracker.
This is a open-source project, so devs don't get money, they do this in their free time. So don't waste time with disscussions in the forum, instead report it in the bug tracker and describe exactly whats wrong with Spring and how to reproduce the bug.
How to report bugs
To report a bug, please give a description, what is going wrong and how it can be reproduced. what steps are required to reproduce it? If required to reproduce the bug add a script or/and a link to the Game/Map.
Nearly always attach infolog.txt, as it contains system/driver/version info and if spring crashed, it also (should) contain a crashdump, which allows to find out, why it crashed and to fix it. If it makes sense, make a screenshot + attach it.
Attach a replay: often Bugs can't be reproduced, its often better to see something than to only read about that.
Screenshots are taken with the F12 key and saved in the \screenshots\ folder.
If a dev asks you for more information, please answer his questions. The better the bug-report, the better the chances, that it will be fixed!
Try to avoid endless discussions why a bug was introduced, be polite!
If you want more tips for a good bug-report, please read "How to Report Bugs Effectively"