Forgot to add: did not make it in at StockXpert yet.  I can try again in a couple of weeks.

Greetings from a fellow Newbie.  I have mostly nature and landscape shots too.
Here's how I've done so far:

Shutterstock: So far I've had the best results in terms of acceptance and sales.
IS: got in  after 3 tries, but it's too soon to see how things will sell there.   
DT: acceptance rate is 27% which is kind of pathetic, but I realise that I made the mistake of submitting too much "bordlerline" pics during my early days there. 
123rf: accept a lot of images, but have yet to make a sale
BigStock: accept quite a few, but have yet to make a sale
Fotolia: this site rejects almost all of my shots.  Clearly it's a bad match so far.

Hey, cool - found it!! Thanks - this will help me figure out the boatload of rejections there. 

KB, I found message area in Fotolia where it says why the image was rejected.  However, I can't figure out which image is getting rejected for what reason.  Is there somewhere in Fotolia where you can go back to see what images were given a particular number?   
Maybe I'm missing something that's glaringly obvious...

So far, I'm liking the fact that the other agencies are giving me a chance to see each photo that was rejected, and reasons why.

I've been reading the forums, and it's been interesting to see how people have such vastly different experiences on the sites. 

Many thanks for the responses!

I just checked, and I do see the re-submit option on the two photos.  I'll see what I can do.  At least there are explanations, and they show you what they are rejecting with Istock.

Fotolia just sent me a file number of the ones that were not approved leaving me scratching my head trying to figure out which ones they were.

This should be quite a learning experience.

My portfolio really needs to grow if I'm going to do anything with myself in micro.  At this point I've got mostly animals and flowers.  I can see the flowers will be a challenge to get approved/sold.

Hello everyone,

Apologies in advance if I'm posting this in the wrong section.  My question pertains to what happened to me at one particular site, though, I can imagine, similar things could happen elsewhere.

After several attempts, I finally got accepted at Istockphoto.  I was quite pleased, and submitted my first batch of photos for approval.  I included the three samples that allowed me to be accepted there in the first place.  To my dismay, two of the three samples that were initially approved were now rejected due to "artifacting".  I guess I had a different person inspecting the photos on that day.

My question is: do I resubmit the images in hopes that I get the initial inspector back? Is it better to wait a few months til I resubmit.  Ironically, one of the images was the one that was immediately accepted when I sent my first samples, it's had several downloads already within its first week at Shutterstock.
I guess this an example of things that I'll encounter in this world of Microstock.

Hi Kirsten, I just started my journey into the world of Microstock a few weeks ago.
Of the big six, I've managed to get in at all but StockXpert, and had the most difficulty getting in at Istock.   My portfolio is really tiny at this point.  Hopefully it will grow.
I realise that I'll probably have to invest in some lights, and background if I want to get ahead.  I'm currently researching what a good starter kit would be. 
I'd love to know how it's going for you.