I've been trying to troubleshoot a bizarre situation where visitors appear to be randomly told that the website can't be found (while other visitors have no problems) - the barred visitors can usually find the site 10 or 20 minutes later. The server shows no downtime.
A search of the server logs shows only an endless stream of the following code. "xxxxxxxx" has been substituted for the actual directory name:
[05-Dec-2012 04:27:14 UTC] PHP Fatal error: Uncaught exception 'Cart66Exception' with message 'Promotion save failed: Array
[name] => Promotion Name is required
[code] => Promotion Code is required
' in /home/xxxxxxxx/public_html/wp-content/plugins/cart66-lite/models/Cart66Promotion.php:165
#0 /home/xxxxxxxx/public_html/wp-content/plugins/cart66-lite/models/Cart66Promotion.php(140): Cart66Promotion->save()
#1 /home/xxxxxxxx/public_html/wp-content/plugins/cart66-lite/gateways/Cart66PayPalStandard.php(197): Cart66Promotion->updateRedemptions()
#2 /home/xxxxxxxx/public_html/wp-content/plugins/cart66-lite/models/Cart66PayPalIpn.php(77): Cart66PayPalStandard->saveOrder(Array)
#3 /home/xxxxxxxx/public_html/wp-content/plugins/cart66-lite/models/Cart66ShortcodeManager.php(436): Cart66PayPalIpn->saveCartOrder(Array)
#4 [internal function]: Cart66ShortcodeManager->processIPN('', '', 'ipn')
#5 /home/xxxxxxxx/public_html/wp-includes/shortcodes.php(235): call_user_func(Array, '', '', 'ipn')
#6 [internal function]: do_shortcode_tag(Array)
#7 in /home/xxxxxxxx/public_html/wp-content/plugins/cart66-lite/models/Cart66Promotion.php on line 165
If you run a search for "Uncaught exception 'Cart66Exception'" you'll find it seems to be consuming huge chunks of the internets.
I have no idea if this is the cause of my problems but it strikes me as being something Cart66 should be addressing.