In AP you can store your images in folder/project/album/'light table' structures while in LR you can store your them in collections only.
I can put my pictures into projects that are created in folders (e.g. 2012/events/pony riding) and I can create virtual subfolders like album or light table.
Both aplications can handle virtual sets (Smart Collections in LR, Smart Albums in AP) with similar filtering capabilities.
In my opinion the organizing features are more sophisticated in AP.

I agree with Giorgio. You should try them parallel to decide that which one is the most useful for you.
The Lightroom is a nice SW with nice features, but the Aperture has far better organazing features. And the Lift/Stamp feature is great to copy the settings (changes and EXIF, IPTC data) from a picture to another ones. You can use more curves tools with different settings and you can paint over the different areas of the picture with them. You can use the same method with almost all tools. So the Aperture is a really professional tool IMHO.

Yes, it is. The release date of it is 22 Apr 2010. There isn't newer one.

You're right John. Our life would be easier but I'm affraid then would be a lot of incompatible bayonets and all filter manufacturer would make their products for canikon only.

I never use live view, but now I've tested on my similar combo. I managed to reproduce the issue. After that I tried out the live view with 50-135, the result is the same. At last I tried it with a Tamron AF 70-300m lens. And the sensor was shaking...

Nice idea Stuey but the problem with your suggestion is that my low-profile frame filter has approximately 1mm fix part where you can grasp that and you can't strain the bootlace to that part.

Thank you John for your help.

The gloves is also a great idea and that has an advance, you can use that on the spot.

OOps! I just noticed that the title has mistypes. The title correctly:
My today's fighting against polarising filter

I bought a Hoya PRO1 Digital Circular Polarising filter to my smc DA* 16-50/2.8 ED AL [IF] SDM lens. This filter has low-profile frame that is good to avoid the vignetting at the wide-angle end of the lens.
I used it many times without any problems. But last time I forgot to remove it from the lens when I finished the taking pictures. Today morning I couldn't remove it, the filter didn't want to move. I tried for a half an hour using force with no success. Thanks to the low-profile frame I wasn't able to grasp well the filter.
In my last desperation I tried to use a hair dryer. I blew with hot air the verge of the lens for a few minutes and it has released the filter.
The edification is that you should have a hair dryer at hand when you use a Polarasing filter with low-profile frame.

A free alternative of the Lightroom could be the RawTherapee.