Sorry, what are you reporting? That looks normal to me. Individual personal message posts are now colored in “your” color if you are the author of the specific post in the PM. Like so:
I wrote the first post ←
someone replies
someone replies
I reply ←
someone replies
I reply ←
If you look at the pic. In this case the linked topic preview has grey on drk grey background. Making the text unreadable. The same issue in quoted text in pm