Steps to reproduce:
0. Turn off the blocker of default browser
1. download test case from http://sqeweb.us.oracle.com/deployment2/sheldon/webCases/javafx/fxfeaturesTest/fxfeaturesTest/showdocument.zip
2. unzip showdocument.zip
3. Run applet by double clicking showdocument/html/TestFXShowdocumentInvalidFile.html
4. It will try to open a local file
Expect result:
5. if the file doesn't exist, it should open a new tab or browser windows.
   if the file exists, it should open the file via browser.
Actual result:
5. nothing is opened no matter the file exists or not.

Note:
Xp sp3 x86 with IE8 didn't have such issue. It works as expected result.
This bug might be introduced after b44.