I have now seen this issue twice with different scms. Having tried deleting the scms and md5 files then re-installed from ibiblio the ScmBrowser reports success but the md5 check reports failure and the apps refuse to load.
The first time this was experienced I assumed it was user error due to unfamiliarity and eventually deleted and recreated the test environment. Now it has arisen again I am interested to learn how jls_legalize resolved the problem.