mount-sd.sh was overwritten by the update, so obviously you need to add the lines to mount your folders again (step 6 of first post)...

but the really bad part after the update is:
at first look, it seems that mount-sd.sh is now called for the first time later than before (now after the "ambiance-stuff"), which is really totally annoying.

the only workaround, i have for now:
copy the ambiance to the "traditional home-folder" (not on sdcard), so it can be accessed at bootup.

i hope, i or someone else finds a better solution (or this will be gone with the next update).