Other hidden files do not get in the way, as I rarely get to those locations...
The red info is drawing so much attention (as it was intended so), that I will have to get rid of it if I want to use descriptions. Pity, as it was quite useful when used with filters.
By the way, I do get notices of messages posted here, but the links are wrong, they lead to: ”The topic or post you requested does not exist”.
You could always set Opus so that the 'descrip.ion' file is not actually hidden. Not a perfect solution but it will prevent the red text from bugging you unnecessarily.
As for the broken link, what email client are you using? We've had no other reports of this happening.
As for the links: I usually use a mail checker, PopTray, as it is much more efficient for shorter messages. I have checked it with Thunderbird and it is, indeed, working correctly. Must be some PopTray quirk.