Users who reportBugs against POI frequently wonder why nothing is done. Sometimes the developers are too busy and its just too minor. However, much of the time they can't reproduce the bug or the bug report is written in such a way that its just not useful.
Never put "it doesn't work" with hardly any description or "It doesn't work undersome recent JDK". It probably does, just obviously not for you. Consider first asking a question on the mailing list. Often problems aren't bugs, but usage issues. In such case a bug tends to get closed with "ask on the mailing list". You can save everyone time by asking there first.
Always... ALWAYS attach a *minimal excel file* and a *minimum runnable piece of source code* which replicates the problem start to finish. Even better is a JUnitTestCase! Chances are we can't replicate it without this. See the Submitting Patches] section and follow those instructions on how to attach the file.. Don't send them to the list (rude to low bandwidth users).
Always report exact versions of your JDK, OperatingSystem, ServletContainer (if applicable), etc. Don't make us ask, it wastes time.
We DO appreciate the bug reports and do read and eventually resolve them, but its done as we have time and in an invisible order of priority. If you need priority style support and immediate answers purchase it from a supporting vendor.