Recent LX90 purchasers may come across a problem with the Autostar controller when entering multiple custom sites. If your handbox software version is 33ef (as mine was) you may experience some problems. One custom site can be entered OK but when a second is entered it will appear OK until the handbox is powered off and on again. In my case the additional site was no longer there and in some cases the original had been corrupted or was totally missing. Further attempts to reinput the site resulted in error messages. There is a new software version 33ei on the meade website which fixes this problem.
http://www.meade.com/support/auto.html
If you're upgrading your software it's important to be patient and watch the status bar at the bottom. In my case the update was quite slow, over half an hour. I also had to reset the controller after download to correct the site anomolies.
Note: please read the rest of this thread as there may be some issues with the version I downloaded which is apparently 33EL not EI.