Solved: Aptana crashes with error Ubuntu 9.04 Jaunty

I installed Aptana this morning, but when I tried to run it for the first time I was met with an unfriendly error message saying that Aptana had enountered an error and need to close, and that I should check the error log. The log complained that it couldn't find a particular shared library:

org.eclipse.swt.SWTError: (...) libswt-mozilla-gtk-3236.so: libxpcom.so: cannot open shared object file: No such file or directory

Apparently this has something to do with Aptana wanting to use Firefox 2 for the debugging browser, not FF3 that now ships with Ubuntu. A bug report here offered a simple solution that seems to be working for me so far. The library in question is provided by the libxul-dev package. All I did was:

sudo apt-get install libxul-dev

and the problem went away. Joy.