I typed some text and then used the "save as" function. Everything worked naturally except the Files of type bracket where the selections appeared 2 times each. However, I was able to save the text as I wanted. I attach a snapshot of the malfunction.
I am using windows 7 64-bit.
I definitely see that after I've opened up a 2nd window within the application. Each subsequent window adds another set of duplicate file filters in the "Save as" and "Open" choosers.
Same thing happens after opening new tabs.
Fixed in r657.