Brute-force solution: save this as spotify-fixer.py, run it as cron job:

  #!/usr/bin/python

  target = "/Applications/Spotify.app/Contents/MacOS/Spotify"
  with open(target) as infile:
      bytes = infile.read()
  with open("./Spotify", "wb") as backup:
      backup.write(bytes)
  fixed = bytes.replace("VACUUM;", "xxxxxx;")
  with open (target, "wb") as outfile:
      outfile.write(fixed)