Hi Chris,
Remove red shadow from links:
The line specifying "a:hover {text-shadow:0.2em 0.3em 0.2em #F88;}" cannot be line 21. I checked again and it actually is line 72 of the file css/css.php.
Curved edges:
I checked at "calendarforum", which is the website of my Danish friend who always helps testing new calendar versions, and saw no listing at all. Maybe you mean the round edges of the so called displays which you can see on the Demo -> Displays page of this site?
Thumbnails:
In the mean time I've added a notification "Copied to Clipboard" to the next LuxCal version, which will be released next month (March).
New Question:
If you want to get rid of the "Previous year" and "Next year" arrows, you should edit the file "views/month.php" and comment out (// at the start of the line) lines 84 and 85, starting with $arrowLL and $arrowRR respectively.
In the new Calendar version on narrow displays the "Previous Year" and "Next Year" arrows will will have more distance to the inner arrows.
Roel