[plt-dev] DrScheme v4.2.5 won't load Dracula

In the latest release, DrScheme freezes indefinitely when trying to
load the Dracula language level.  It worked in 4.2.4.x, it worked in
the 4.2.4.900 release candidate I tried, and it works in 4.2.5.8 on
the trunk, but not in the release.  I have narrowed the problem down
to the module path in the Dracula module-based-language-level's
"get-module" method.  If I change the module to be "scheme" instead,
the language level loads fine (aside from using the wrong module); the
GUI elements work fine, and so forth.

The module path causing the problem is (planet "dracula.ss" ("cce"
"dracula.plt" 8 10) "lang").  In both 4.2.5 and 4.2.5.8, I can require
this path into a regular "#lang scheme" window just fine if "populate
compiled/ directories" is off; I get a "module mismatch" error with
that option turned on (see PR 10685).

Does anyone know what might be causing this problem, and/or how I
might work around it between now and the next release?  Some students
using Dracula in Rex Page's class at the U. of Oklahoma ran into this
bug and I had to tell them to downgrade to PLT v4.2.4.

Carl Eastlund