I don't see where anyone said that Arabs can't be beginner horses. I might be missing it, though... Here's all I found:
i love arabs and all but some of them just arent meant for beginners.
The poster simply was stating that some
Arabs aren't meant for beginners, which is true. Some quarter horses aren't meant for beginners. Some morgans aren't meant for beginners, etc.
I love Arabs, but am one of the first to admit that they can be a special breed, and many of them (note, I did not say "all") do have special requirements that a beginner just might not understand. The ones I have owned have been very sensitive to their handler's mood and were very easily offended.
On the other hand, a friend of mine owns an Arab that would rival a steady eddy quarter horse in the "good ol' boy" category and she trusts him with just about any rider.
Now, back to the original poster:
From the description, I would think that it was more of her prancing around and nervous behavior rather than an all-out bucking/rearing fest.
This just sounds like a horse that hasn't had a saddle on in awhile. Didn't you say it's been a year since she's been ridden?
I don't plan on going too fast at all. Right now, we're just working on calmness.
Sounds like a good plan. While you're working with her, you'll be able to build trust in each other. I don't know what her situation was with her last owner, but if she had a bond with that person it might take awhile for her to see you in the same light. Good luck!