Does Hibernate remove local var syms from non-mapped classes?

I believe that Hibernate does dynamic bytecode modification of classes
specified in the mapping file, correct?

Assuming that's true, is there any possibility that Hibernate could
possibly have any impact on other classes that are not specified in
the mapping file? I'm seeing a strange symptom in RAD 6 (Eclipse 3.0)
where I'm realizing that my class files are losing their
LocalVariableTable, which causes the debugger to not know the names of
local variables.

I see this symptom appear when I restart my project, which (among
other things) causes the Hibernate startup code to execute.

If I manually change the source file and save it, RAD does hot
swapping, so it compiles the file and uses the new class file, without
having to restart the server (WebSphere). When I do this, it "fixes"
the problem. The next time I hit the breakpoint in that source file,
all the local variable names are present.

We've added some debugging to RAD that shows detailed events in the
Error Log when RAD itself has to recompile classes. When I do a
"Restart Project", I see that event, but it only lists some other
generated classes, and not the classes I'm trying to debug. However,
when I check the timestamp of the class file, and use "javap" to see
the LocalVariableTable, I see that the file was just modified (about
the time I did the restart project), and "javap" shows that there is
no LocalVariableTable.

This seems to imply that Hibernate could possibly be what is
recompiling those classes, essentially without debug, by removing the
LocalVariableTable. Is that at all possible?
.