Getting the backtrace from a kernel panic
You may know the following situation. You arrive in the morning in the office, do what you always do and check out the latest changes of the software you are working on. After a little bit of compile time and the first coffee you start the just build application. Bumm, kernel panic. After rebooting and locking through the changes you may have an idea what the reason for this could be. A colleague of you is working on a fancy new feature which needed changes to a kernel module. As you almost know nothing about this code you seek for help and, as it of course not happen on his computer, he is asking for a backtrace of this panic. You have two problems now. First you need to see the panic yourself and second it would be nice to get a copy of the backtrace for sharing this info within a bugtracker. In the following post I will show how both aims could be easily archived.
Using suppression files with Valgrind
Valgrind is one of the great tools in the long list of freely available applications for development. Beside several profiling tools it also contains a memory checker. Leaking memory is one of the more common errors a programmer could step into. Basically it means to forget freeing memory (or in a more general sense: any resource) a program has acquired. If you are a perfect developer, this will never happen to you. If you are a good developer it may happen and that's where Valgrind will save you some trouble. As most of the developers out there are more or less good developers, their programs produce memory leaks, too 
. The right solution for this, is of course to write a bug report. But there are times where this isn't possible or you are in hurry and don't want to see all the errors of a third-party library you link against.
Changing the default behavior of built-in Cocoa controls
Apple has many task specific controls built into Cocoa. They are all well designed and have most of the functionality a user and a developer expect. One of this controls is the NSSearchField. This control has a special design which allows the user to recognize the provided functionality with ease. It is so well-known that Apple uses the design even on there website. It has support for menus (e.g. for recent search items), auto completion, a cancel button, and so one. Although this is mostly feature complete, there are sometimes cases where you like to extend it. In this post, I will show how to add another visual hint to this control when a search term isn't found. The aim is to change the background of the underlying text edit to become light red to visual mark the failed search.
A simple WordPress plugin
As you may noticed I use WordPress for my blog. This is an unbelievable great piece of software. It has uncountable possibilities for enhancements and as soon as you begin to explore these, you start adding some of them to your own blog. One of the plugins I added was WPtouch. This plugin wraps your blog into a theme for mobile devices if they are detected. This works for the iPhone, the Android platform or even Palms webOS. The theme is styled in a way it makes the content more readable on such (screen) limited devices and moves the menus to some extra place.