Problems with alingment and spaces between paragraphs

Usually my posts and blockquotes appear justified but sometimes don't, and I don't know why. I always write using the composer or notepad, never copy from Word or other websites. I've added CSS for the blockquote and this seems solved now, but the first paragraph of the post is not justified (but the other paragraphs, surprisingly, are):

http://www.albertesplugas.com/blog/20...

Also, as you can see in this same post, in the blockquote there is too much space between paragraphs. It's not the usual space you see between paragraphs in other posts. I did a test in a different post and the extra space disappears if I press the back space to put together both paragraphs and then I press enter again.

Please can you look into this and let me know? It's a minor thing but still I would like to have it fixed.

Also, please note that I don't think this other question I posted yesterday in this forum was properly answered even I you think it was: http://getsatisfaction.com/sixapart/t...

Thanks a lot,