Since a recent update of OSX, there's an issue with the Java-plugin not being active, even though Java Control Panel says it is. This is because in Safari the plugin is still set to inactive.

To resolve, surf with Safari to www.java.com/nl/download/testjava.jsp. You see the Java website with in the center the notification that the plugin is not active. Click on the text to re-active the plugin.

Apple has decided that the latest release of their OS, Mac OS X Lion (10.7), is no longer available as an install media. New systems have a recovery partition (called a Recovery HD) with the installation files, and those with earlier versions of the OS (Leopard and Snow Leopard) have to buy it via the App Store as a download.

The last scenario is in fact a hassle if you ever want to reinstall your Mac: prior to installing Lion, you have to install Snow Leopard, then all the updates, before finally downloading Lion. It would be so much easier if one could just install Lion from scratch.

Luckily, there's a way to create an install DVD yourself very easily: the install image is available insi  ...