If you use the javafx.stage.FileChooser as save dialog (see below) sometimes the dialog crashes (see crashreport). Especially if you use UI-animation in parallel.

FileChooser fileChooser = new FileChooser();
fileChooser.setTitle(title);
fileChooser.setInitialDirectory(initialDirectory);
fileChooser.getExtensionFilters().add(extensionFilter);
projectFile = fileChooser.showSaveDialog(((TouchCreatorFXEditor)getEditor()).getStage());

Thread 57 Crashed:: Java: Thread-67
0 libsystem_kernel.dylib 0x00007fff88d94ce2 __pthread_kill + 10
1 libsystem_c.dylib 0x00007fff8f92a7d2 pthread_kill + 95
2 libsystem_c.dylib 0x00007fff8f91ba7a abort + 143
3 libjvm.dylib 0x00000001033b4c93 os::abort(bool) + 25
4 libjvm.dylib 0x00000001034a344e VMError::report_and_die() + 2306
5 libjvm.dylib 0x00000001033b6387 JVM_handle_bsd_signal + 1073
6 libsystem_c.dylib 0x00007fff8f97ccfa _sigtramp + 26
7 libobjc.A.dylib 0x00007fff8661c3d0 objc_msgSend_vtable15 + 16
8 com.apple.AppKit 0x00007fff8ae8a6bd -[NSCell dealloc] + 344
9 com.apple.AppKit 0x00007fff8ae8a55b -[NSTextFieldCell dealloc] + 278
10 libobjc.A.dylib 0x00007fff8662003c (anonymous namespace)::AutoreleasePoolPage::pop(void*) + 434
11 com.apple.CoreFoundation 0x00007fff8db98915 _CFAutoreleasePoolPop + 37
12 com.apple.AppKit 0x00007fff8b27722d +[NSSavePanel _crunchyRawUnbonedPanel] + 237
13 com.apple.AppKit 0x00007fff8b27713e +[NSSavePanel savePanel] + 18
14 libglass.dylib 0x000000011285cbef Java_com_sun_glass_ui_mac_MacCommonDialogs__1showFileSaveChooser + 127
15 ??? 0x0000000103ab8f90 0 + 4356542352
16 ??? 0x0000000103aad333 0 + 4356494131
17 ??? 0x0000000103aad333 0 + 4356494131
18 ??? 0x0000000103aad333 0 + 4356494131
19 ??? 0x0000000103aad333 0 + 4356494131
20 ??? 0x0000000103aad333 0 + 4356494131
21 ??? 0x0000000103aad333 0 + 4356494131
22 ??? 0x0000000103aad333 0 + 4356494131
23 ??? 0x0000000103aad333 0 + 4356494131
24 ??? 0x0000000103aad333 0 + 4356494131
25 ??? 0x0000000103aa74f7 0 + 4356470007
26 libjvm.dylib 0x000000010328855f JavaCalls::call_helper(JavaValue*, methodHandle*, JavaCallArguments*, Thread*) + 557
27 libjvm.dylib 0x0000000103288a3c JavaCalls::call_virtual(JavaValue*, KlassHandle, Symbol*, Symbol*, JavaCallArguments*, Thread*) + 256
28 libjvm.dylib 0x0000000103288b76 JavaCalls::call_virtual(JavaValue*, Handle, KlassHandle, Symbol*, Symbol*, Thread*) + 74
29 libjvm.dylib 0x00000001032bf4f0 _ZL12thread_entryP10JavaThreadP6Thread + 169
30 libjvm.dylib 0x00000001034782b4 JavaThread::thread_main_inner() + 134
31 libjvm.dylib 0x000000010347979a JavaThread::run() + 440
32 libjvm.dylib 0x00000001033b51b5 _ZL10java_startP6Thread + 173
33 libsystem_c.dylib 0x00007fff8f9288bf _pthread_start + 335
34 libsystem_c.dylib 0x00007fff8f92bb75 thread_start + 13