I bet you the small bubble you have around the ear piece are a result of specks of dust that got trapped underneath when you applied the cover
i just applied my stenheil protector today and it took a good 10 mins to get it perfect but i'm VERY happy with the final result. i just got my 3GS two weeks ago and i had bought another screen protector first that didn't work at all.
In order to replace it I bought the ultrathin case from sgpstore and it came with the steniheil antiglare and antifingerprint screen protectors. i applied the antifingerprint one to my phone already, and i'm going to try the antiglare one on my wife's phone later.
a few tips that a couple of my friends told me that will help you apply your screen protector for a perfect no bubble result:
1. clean the screen thoroughly first with a pc/electronics wet wipe - this will get rid of all grease - unfortunately the screen protector does not come with a wipe)
2. dry with the provided microcloth (there should be absolutely NO dust left - in fact, I would work in a really clean area that you have already cleaned prior to all this)
3. take a piece of scotch tape and apply it to the screen protector on one end (on the non-adhesive side) - it should be long enough that it hangs over the end of the protector - you will use this to hold onto the protector as you apply it
4. be careful not to touch the adhesive side as you use the piece of scotch tape to remove the screen protector from it's backing
5. line up the top of the protector with the top of the iphone - i used the edges and the ear speaker as a guide
6. holding the protector by the scotch tape very slowly lower it from the top end down - you really shouldn't get any large bubbles at all if you go slow enough and put a good 'bend' in the protector as you lay it down
7. now the tricky part - some small bubbles may exist - i found they were appearing because of small flecks of dust near the edge
8. carefully lift the protector near those edge that have bubbles - again use scotch tape not your fingers! you don't need to fully remove the protector - just enough to expose the part(s) that had small bubble
9. take another piece of scotch tape and apply it spefcifically to the spots that have the specks of dust that are creating the bubbles
10. again, be careful not to touch antyhing else (like your fingers) to the adhesive side as this will mark it all up
11. carefully lower the protector back down - bubbles should be gone
12. use the provided "squegee" to get rid of any other bubbles. if any bubbles remain i found it was because of dust - so just repeat steps 7-11 again to remove the dust
i got a perfect result at the end - but it took some effort to remove all the little specks of dust
