After upgrading from Jenkins 2.2 to 2.3 I noticed the post-build action "Trigger parameterized build on other projects" does not pass predefined parameters to the downstream project.
I tested it on Jenkins 2.5 but the same problem appeared.
You can reproduce it by creating one simple project that has a post-build action "Trigger parameterized build on other projects" which builds a downstream project and passes some predefined parameter to it.
When printing the parameter in downstream project it has empty value.
The same problem when passing parameters from a properties file.