Definitely not a show stopper but just updated to b30 from a much older 4.5/4.9 beta and noticed some slight garbage graphics on the right of the screen when running in fullscreen. Downloaded earlier betas to place when it started and b20 seemed to be the last version without this glitch on the right hand side (b21 I was unable to download due to it flagging my virus scanner but from b22 onwards it displays like this):
Alt-Tabbing away and then back to UAE seems to clear it however. Running in direct 3d11/Hardware d3d11 on an nVidia rtx2080
Here's the logs and config used (seems to happen regardless of using a d3d filter):
http://www.ilovecubus.co.uk/pete/winuaelogs.zip