When exporting to FLAC with a recent master build, I noticed that the output had noticeable (sometimes severe) crackling not present in previous exports. Here's a comparison of the output waveform, with WAV on top and FLAC on the bottom:

Examining the top left of both waveforms, the FLAC export appears to have a downwards DC offset. In addition, when this offset wave reaches -1.0, it wraps around and "sticks" at 1.0.

Export options: 44.1kHz, 24 Bit, Sinc best, No oversampling

Also, a minor filename bug:

• When choosing output location, leave extension on the default "WAV"
• Select FLAC as output format
• File extension of exported file is .wav.flac