waterfall malfunction (?) with fldigi-3.23.22.8

[Giuseppe C. <giu...@un...>]

Hello again,

I've installed fldigi-3.23.22.8, selected the CW modem, turned on the receiver, tuned the receiver to a band with some audible cw signals.  But the waterfall fails to show the signals, and instead shows a exponentially-decaying band of palette colors.  See attached screenshot.  With the older release of fldigi (3.20.21), however, things works as usual.  Help will be appreciated...

Thank you,

iz1qze Giuseppe