Lotus notes if ironclad proof of incompetence. It seems it is poorly designed on purpose with a heavy dose of soviet union Era efficiency thrown in.
A notable example is F5 keyboard shortcut, which is used to refresh window contents in Microsoft Windows Explorer, Microsoft Outlook 2007 and Microsoft Internet Explorer. Pressing F5 in Lotus Notes before release 8.0 caused it to lock screen.
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In earlier versions the out-of-office agent needed to be manually enabled when leaving and disabled when coming back, even if start and end date have been set.
http://en.wikipedia.org/wiki/IBM_Notes#Comparison_with_other_email_clients
The same could be said for virtually every software program, particularly operating systems, put out by MicroSoft in the last fifteen years, yet they hold a massive market share as well. Lots of large companies stumble at times.