The default file name for Export table feature (exporting nodes from data laboratory) causes the save window not to save the file:
Here is what happens when I click "Save" button without modifying the default file name:
This seems to be caused by the square brackets "[Nodes]" included in the default name, removing them solves the problem.
This happens to me on crunchbang linux 'Waldorf', which is basically a Debian testing with openbox window manager.
Product Version: Gephi 0.8.2 201210100934
Java: 1.7.0_07; Java HotSpot(TM) 64-Bit Server VM 23.3-b01
System: Linux version 3.7.0-6.dmz.1-liquorix-amd64 running on amd64; UTF-8; en_US (gephi)