rstudio/shiny — pull request #539 by yihui (2014-07-10 05:11:23+00:00)
Title: add a Note section to the documentation of conditionalPanel(), since it ...

...always confuses R users

e.g. https://groups.google.com/d/msg/shiny-discuss/AFItYcRXzyw/ywRy3EEtjw4J