I'm not sure what the solution is but there does appear to be a limit.
Whether that is hard coded or an option that can be changed I don't know.
If not an option maybe someone can come up with a hack that adds a return
in after x amount of characters.
It appears to be sitting at about a resolution of 1600x1200 or maybe even 2000x1600,
but I can't test it because my current display only goes to 1280x1024. I guess if
I had a wall size display I could run it that high & still read without squinting.
I never liked XMB
Of all the forums i've installed, moderated and looked after, XMB was one of the worst in my opinion.
Vbulletin is best in terms of quality, speed and features imo.