What Does it mean ? " Apple is not signing 4.3.3 "

Experts,

I have ipad 2 4.3.3 and iphone 4 4.3.3. what i want to know is..what does it mean for not signing 4.3.3 ?

I have installed Tiny Umbrela and Saved SHSH for both. But, what i have found , there is one .SHSH file ( 2KB ) created under my User directory.

SO, Now since Apple is not signing 4.3.3, Am i safe now ? Means can i restore my ipad2 and iphone 4 to 4.3.3 ? any time ? for as many times i want ?

plase some help to understand it.

sbddude said:

if your ipad is not the 3g version and you have SHSH blobs, then yes you can restore it to 4.3.3.

If it is 3g, you cannot restore it to anything but the current version. Right now that is 4.3.4. This is unique to ipad 2 3g.

Your iphone can be restored if you have the blobs.

Click to expand...

Ok GR8,
But just to make sure..how do i check ? if i have my SHSH saved ? for my both idevices?

Just checked in cydia.
it shows SHSH : iOS 4.3.2, 4.3.3 for my iphone. Does it mean Cydia has my SHSH saved ? and it will be safely kept for always ?