OS: OS X 10.10.3
Xojo: Xojo 2015r2.1
Steps: After working for a while on a Web Edition project, the item Insert Webstyle disappears from the Insert menu.
Since it is kind of random, I could not pin it until today. See attached movie.
Expected Result:
Access to “Insert Webstyle” in the Insert menu
Actual Result:
No “Insert Webstyle” 
Workarounds:
Quit Xojo and relaunch
<https://xojo.com/issue/39165>
It is not the end of the world, but it is annoying…