I'm really puzzled that a file is recognized by one version of Alice but not the other using the same hardware. I've had trouble going from machine to machine with files from Takeo Igarashi's web page (Smooth Teddy, etc.,
http://www-ui.is.s.u-tokyo.ac.jp/~ta...ddy/index.html)
but those are experimental and from different time frames, different original programs and possibly different versions of Java. Even so, the results were consistant on one machine. Since they are fun programs anyway, (and for me, Smooth Teddy seems to import into Alice fine) you might spend a bit of time with them and see if you have problems.
Also, if you want, send me the files (both .ase and .a2c) for one of the objects you're trying to add and I'll give it a try on a couple of my machines, one of which does have various problems with Java.
Re trying to show a thumbnail, I haven't gotten a response yet. Really don't think it's too hard but I was hoping for an "official" answer. Not an immediate problem - only have one or two files that I've created that are worth importing - but if and when I need to, I can't figure it out, I'll repost the question.
Jim