For some reason I've always thought that Bert has suffered from a bout of depression and just needed some time out. The stress of software support can do that to a man and I've even been through it myself years ago.
But I'm only guessing, of course - anything could have happened.
If you are reading this Bert, I just want to say that you are greatly missed and that there is no shame whatsoever in taking some time off to rest. You have not let us down. You will be welcome back here with open arms and there's nothing at all to be embarrassed about. In fact, we'd all celebrate your return!
- rune