Remote files Properties unreadable

Since 6.6 I can no longer see the values for remote file properties.

If I right-click a remote file and select 'properties' the Properties overlay has the filename, location, and size showing as solid black bar (? black text on a black background?) (see image)

Viewing the same on 6.5.7 shows the file correctly.

I've tried 6.6.4.RC-Portable, and 6.7 (installed) -- both display the same (black bar)

Interestingly: local files display correctly in all versions. Different remote servers (SFTP) makes no difference (6.7 is wrong on all of them, but 6.5.7 is ok)

Is there some display setting I need to tweak in 6.6+ which is affecting the colours (theme?)

Changing the "Interface theme" between Light, Dark, Automatic makes no difference. Nor Commander vs. Explorer.

Thanks,
James

( Win 7 Pro SP1 32-bit; SFTP; just upgraded from 6.5.7 to 6.7, but also tested on 6.6 )