Silverstripe 3.0.3 / 3.0.5
I migrated a Site from our test server to client's server and noticed that ?debug_profile=1 won't show any info on the client's server (was ok on test server).
Loaded project to local machine (MAMP): same problem.
Did clean install on local machine (3.0.5) with new/empty db: same problem.
With old projects (SS 2.4.x) profiler worked.