I hope others will verify if they do, or do not have have this issue. I just tested with build 463 and the issue still exists.

To summarize, pressing either Alt button will cause much of the Preferences pop-up windows to go blank. Below are screenshots of normal and after Alt pressed with the Leadsheet options window open.

Attached Files (Click to download or enlarge) (Only available when you are logged in)
Leadsheet.jpg (116.39 KB, 72 downloads)
Alt Leadsheet.jpg (92.41 KB, 72 downloads)

Jim Fogle - 2025 BiaB (Build 1128) RB (Build 5) - Ultra+ PAK
DAWs: Cakewalk by BandLab (CbB) - Standalone: Zoom MRS-8
Laptop: i3 Win 10, 8GB ram 500GB HDD
Desktop: i7 Win 11, 12GB ram 256GB SSD, 4 TB HDD
Music at: https://fogle622.wix.com/fogle622-audio-home