lib.d:
----
import std.stdio;

template T() {
    static this() {
        writefln("A");
    }
}
mixin T;

mixin(q{
    static this() {
        writefln("B");
    }
});

static this() {
    writefln("C");
}
----

test.d:
----
import lib;

void main() {
    import std.stdio;
    writefln("You should see ABC above.");
}
----

Compile the above files with the following:
$ dmd -lib lib.d
$ dmd test.d lib.a

The first static constructor (A) is not executed when lib.d is a library. Note that when compiled with `dmd test.d lib.d` this works as expected. Tested on Linux32 and OSX32 with dmd 2.056. This worked in previous releases, it is currently broken (not sure when it broke).