I don't know if these issues are linux only or not:

Bugs so far in V1R4:

Opening multiple files makes DS to only display the contents of the last one selected. You have to flip between model and layout tab to show the contents of the other drawings. Seen on Ubuntu 32bit and 64bit on 2 different machines.

The objects are there but not drawn. And no, they're not in a frozen layer.

The Printing mess:

Default settings just sucks. No, I don't want to print on a index card sized paper and I don't need to print on Japanese envelopes either. Please give me a way to remove unwanted paper sizes. My printer is set to A4 in the Ubuntu printer settings, but Draftsight loves index cards for some reason. Did someone at Dassault moonlight as a librarian?

Index card 3x5 is the first paper size listed in the printer PPD file. So, to remove paper sizes means editing the PPD. My PPD file now have one paper size, a4.

I don't want to fit my drawing on said index card. Printing 1:1 on A4 would be better for me.

And when fitting drawing to index card, it won't print it in that scale on my A4. Apparently index card(76x127mm) is larger than A4.

Probably typo in PPD.

Selecting A4 and fit to said A4 will fit the drawing to 210x297mm, which make the outermost lines disappear in the hard coded margin of the printer.

Probably bug in PPD or Draftsight ignores settings.

There's no way of setting the printable area in the software and no way of calibrate the printer. A 200x200mm box will come out as 200x199mm.

Line thickness gets rounded down to closest 1/64 of an inch, but printing to PDF and then printing that PDF works. Thanks to that rounding bug, I'll have to use 0.4mm and 0.8mm line thickness, which means when printing stuff where lines gets close to each other the printing algorithm remove lines.

Behold my beautiful handwriting.

I wrote about most of those issues two years ago (V1R2) and managed to tick the "validated" box with no way of untick it, which I wrote about in the comments and reading the comments, there are others with the same line thickness problem.

Text added later in italics