1. There is no way to go directly to a message from the Activity log, only to the 1st page of the thread (see pic). Mighty inconvenient for multi-page threads like “Welcome”.
2. The footer in the image pop-up blocks the lower part of the image. Very inconvenient if you have to read any text there. People usually don’t (and shouldn’t) provide extra space at the bottom of their screenshots. See pic.
Another interface issue. When I try setting a text color in a message, the text changes color in the editor but stays black in the posted message. Only SPAN tags are wrapped around it but they are converted to text and not treated as HTML code to change the color. See pic.