Spacing between paragraphs messed up when trying to post.

If you try to write a post message and break it up into separate paragraphs, when you hit preview you will see that all the separate paragraphs have been run together into one big paragraph (no line breaks, skipped empty lines between paragraphs). And the message will be posted with no empty lines if you don't try to correct it. Sometimes going back and forth and re-editing the message text to put the empty lines back in between the paragraphs while switching javascript on and off between each edit attempt will fix it. If you could fix this issue so that all line breaks (empty lines) in the message text body are accurately kept in the preview and posting of the messages, that would help greatly. Thanks. :)

P.S. This worked fine up until a few weeks ago, when the new forum software was first up and running, there was no such line break problem. If first started happening maybe 5 weeks or so ago. Not sure of the exact date, but knowing the general time frame might help to pin down the cause of the problem.