When the Calendar Event details Comment/Description field contains a lot of text, the text can overflow the boundary of the Description field of the Meeting Room's Event details dialog box.
To restat the issue, when the event description is very large and takes up more than the display size field of the meeting's event dialog box. The text then flows down the Whiteboard area, flowing outside the meeting's event dialog box. Sadly this does not look all that great on the screen and Users tend to be a bit dismayed by the extra text on the screen flowing over the top of the meetings dialog box and anything that is on the whiteboard.
The scroll bars of the Meeting Room's Event details dialog box does scroll the text but up and down the screen, if there is that much text.
Please see the attached images which should explain the problem much better than I can with words.