So, I got this annoying problem that I'm facing quite often starting from these past few days. After the end of every post/message, I'm getting an extra space under the last sentence I end with (just before the signature). Since I don't like having this type of issues when posting/writing messages, I find it very unpleasant to see a left space under. :/

Well, I don't know if this was clear but look down. Don't you think you see an empty space? Why can't I remove this? I've tried with Backspace when Editing, but they didn't help.

Update: Yays for the repairs!

Hrm...let's test this...

Well, that was the test. It left some space but not as much as you had.

Maybe it happens when the sentences are paragraped. If not, I have no idea and I would just guess that is how it is supposed to be, for easier reading or such.

I don't see anything... What are you using to post? Computer? Tablet? Phone? What Browser? 

I think it looks normal and it is just there to give the reader some space between the text and signature, to help break up what the eye is doing...

Also, FYI. If you want to have tigher spaces between paragraphs hit shift and enter at the same time. It looks like this:
See? This is actually another paragraph.

Awoflpaw, if you're using Rich Text Editor (it's default one with buttons for text effects and links), click "HTML" button. There's an empty div with an unbreakable space that adds one more line at the end of your message. You can simply remove it and save the message to get rid of an empty line.

Angel, it worked!