print("\\Clear") or \\Update are interpreted correctly when using Javascript but print("\\Headings:...") or \\Close are not.
The following test-scripts will clearly show the inconsistent behaviour:

// test01.js	OK
IJ.log("foo");		// prints foo
// print("foo");	// same thing

// test02.js	OK
IJ.log("\\Clear");	// clear log window
// print("\\Clear");	// same thing

// test03.js	OK
IJ.log("foo");		// prints foo
IJ.log("\\Update:bar");	// updates screen, prints bar

// test04.js	inconsistent
IJ.log("foo");		// prints foo
IJ.log("\\Close");	// prints \Close instead of closing the window

// test05.js	ERROR
IJ.run("Table...", "name=baz width=350 height=250");
IJ.log("[baz]", "\\Headings:n\tSine\tCosine");	// nothing
IJ.log("[baz]","1\t2\3");			// nothing
print("[baz]", "\\Headings:n\tSine\tCosine");	// nothing
print("[baz]","1\t2\3");			// nothing

//kind regards
//Jens