Sheet effects are turned off by default. Click on the 'sheets' button on the top bar, check 'Activate Sheet Effects', and then click the 'Apply' button.

I've been using CC3+ on various Linux computers using Wine without any problems for a couple of years now. You can use a frontend like PlayOnLinux and simply follow the install wizard.

Edit: You may have to install the Microsoft Core Fonts library if the text is unreadable.

Ah I see now, you're right. I thought I tried adjusting the line width before but I must've had the layer frozen then or perhaps I'm misremembering and was looking in the wrong place. >_<'

Finished a few more maps, this time from the 3rd edition Lords of Darkness source book.

Haha yeah I can relate to that. Some of the maps I finished after the fact. Now that I've developed a workflow and 99% of the work already done I can convert FRIA maps fairly quickly. Also trying to stay as faithful to the original maps was a good choice in hindsight, I saved a lot of time keeping maps sparsely decorated with symbols.