New joyride build 1590

[Build Announcer v2]

http://xs-dev.laptop.org/~cscott/olpc/streams/joyride/build1590

Changes in build 1590 from build: 1586

Size delta: 1M

-Journal 83
+Journal 85

--- Changes for Journal 85 from 83 ---
  + #6190 Don't crash when an activity has its icon missing.
  + #6029 Don't fail when the mount point is already occupied.

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