"you Reached Your Limit Three Links Per Post"... What Does This Mean?

[Domain Master]

I have been trying to post two threads in two separate areas and i keep getting this? And the post does not materialize. What have I done? I have no clue

 

[NameYourself]

I too got a weird posting error when making a for sale listing a couple days ago.. 10,000 char limit so had to break it up into three separate posts for a single list thread. It did have about 4-5,000 characters in it (checked it) but that's definitely the 10,000 character limit like the posting error was saying.