Shiny app execution issue in RStudio

[Bruce Dudek]

Minor issue in running shiny apps in RStudio.  Returning to shiny programming after a few months away with R, Shiny, and RStudio upgrades to latest versions intervening.
When executing a shiny app using the "Run App" button in RStudio, a 12 sec delay occurs with a popup tab saying "Checking Installed Packages".  Apps run fine, but this delay is very annoying when developing code.

Executing apps from R console command line (in RStudio) with runApp() or shiny::runApp() does not produce this.

What do I not understand?  Is there a way to at least prevent the repeated execution of this package checking?

Environment:
Windows 7
RStudio Version 0.99.441
R 3.2.1

shiny_0.12.1

[Winston Chang]

Does it happen when you use the latest daily build?

https://www.rstudio.org/download/daily/desktop/windows/

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[Bruce Dudek]

Updating RStudio tot he latest daily build or the latest stable release (.467) solved the problem.
Thanks for the quick response Winston!