Web AppBuilder for ArcGIS has arrived

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Web AppBuilder for ArcGIS is a powerful new application builder included as part of ArcGIS Online and Portal for ArcGIS. This article explains the important differences between the standard Web AppBuilder for ArcGIS and the Web AppBuilder for ArcGIS (Developer Edition).
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How to: Uninstall 3rd Party Extensions

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Third party extensions can provide some very useful additional functionality to ArcMap, but are not supported because they have not been written by Esri Inc. If ArcMap is not performing correctly, it may be necessary to remove/ uninstall third party extensions to see if this resolves the issue.
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Using OAuth2 App ID Authentication with ArcGIS Online Applications

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When using OAuth2 App-ID authentication with ArcGIS Online Applications, it is worth noting that the Feature Services being consumed by the application must be owned by the application author (the creator of the token). If the Feature Services are not owned by the application author, or are only shared to the application author, the user will receive an error.
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A solution for ArcGIS Online Organization Not Found

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The new version of ArcGIS Online was released last week (3rd July 2013). A handful of users have come across problems when trying to login to their Organization account (for example an error stating "Organization Not Found", or user roles appearing blank once logged in). These issues appear to be related to cached website pages and cookies being stored, referencing the old arcgis.com information.
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