I just downloaded and installed build 1741 (linux version). I use some applets with embedded custom toolbars. These applets where exported correctly with build 1662 in the past, but now the toolbar is shown garbled, and is not functional. I tried exporting to CindyjS, but (at least on my local machine) didn't work either. The resulting html-file displayed a grey rectangle only. I'll try the windows version tomorrow.
I attached a screenshot showing the garbled toolbar.