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This is a fairly complex problem, without an easy solution. If you recall, the troublesome facade panels were not installed in the springtime, and there was no mention of this issue. It is possible that we might have an annual recurrence of this phenomenon twice a year, in the spring and autumn. The screen is a temporary solution, as placing film on the panels may not be sufficient (see the architect's project in Las Vegas). Most tall buildings are required to do wind tunnel testing to assess ground level pedestrian issues, it is interesting that there is no mention of testing for day lighting issues that might arise from the geometry of the facade. It is also interesting that facade geometries of this type have been constructed before, but usually surrounded by other screening buildings (cluster) where such issues are minimized. It is interesting how the world's press have also covered the story as well. Some interesting precedents have been set here...