Not intended as a duplicate of the similar Foo thread; curious about usability and technical issues anybody has encountered.
An example (from that similar thread) of a forum difference that could constitute a usability issue:
Quote Originally Posted by Zagineer View Post
As for the things I don't care for:
- I don't like the very short (in the vertical direction) box for replys that I am currently typing in. Could you tripple or quadruple this window in size,... make it like the old format?
(Unfortunately, I haven't found any way to permanently set the text-entry box to a larger size without side effects, but the box is resizable by dragging the bottom-right corner: to the desired dimensions.)

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Other issues that I hope can be eliminated would be error messages, broken links, failing features, and similarly major annoyances.