It seems the forum have a bug where it uses a global variable or file to store posted comments, so if two posts happens simultaneously, then the forum can throw away one posters text and instead insert the other posters text into two different posts.
See post #3 of thread: http://www.keil.com/forum/18464/ 25-Feb-2011 09:06 GMT
which got reused for post #10 of: http://www.keil.com/forum/18452/ 25-Feb-2011 09:05 GMT
resulting in my text being lost.
Besides throwing away peoples texts, it isn't so nice when user A is set as author of comments written by user B. Depending on what is said, one or both authors may find it offensive.