I updated to Spark 1.6.1. Now everytime I start Spark (standalone or plugin version!) an error message comes before the GUI starts to work:
file: /jenkins/root/worksapce/Spark 1.6.1 MAC/PluginsVST/ADS/build/ProjectX/../../../Juce/JuceArturia1.5.0/ArturiaPreset.cpp
I have to click 15-20 times to the ok button - then is everything working...
btw. my Spark library is on a different harddrive, but it's working and it worked great before installing the update (the location is set via the Spark prefs)
(I wrote a message to support too!)