It could be for a similar reason. I receive many emails from people asking me questions about something they found on my weblog.. or for help with various configuration issues.. I try to answer most of them, but sometimes I'm just too busy and sometimes the author is rude or didn't make the slightest effort to answer the question for himself.

I don't mind helping people.. and I'm always greatful to get a note thanking me for something I wrote, but I am a busy person and don't have the time (or inclination, really) to fix something for someone who isn't willing to at least learn.

So if you emailed me and haven't heard back, sorry, use google, or post a question in a forum.. someone there may have more time and patience than I.