Ashton Kutcher, Charlie Sheen beef: 'Anger Management' star slams Jon Cryer's new 'lame' 'Two and a Half Men' buddy on Twitter

Hollywood rebel Charlie Sheen once said that CBS "picked the right guy" when replacing him with Ashton Kutcher on the hit comedy series "Two and a Half Men."

Apparently he's had a huge change of heart.

@charliesheen: "hey Jon!!! u r a GENIUS!!! I effin love and MISS YOU old pal! Q; who's your lame side-kik? #NiceTryCanonBoy #CH."

The "Anger Management" actor's been posting some VERY bizarre tweets lately, jut check it out.

Not sure what the deal is... but Sheen's sort of pulling a major Amanda Bynes.

What's up with that?

FYI - Kutcher is a spokesperson for Nikon, not Canon.

Mila Kunis' boyfriend has yet to respond to the dig. It's probably not even worth his time.

This isn't Sheen's first major social networking freak-out...

Charlie Sheen slams President Obama and Obamacare in epic Twitter rant, 'inane chaos is abhorrent, irresponsibly expensive' - sex tape leak still a msytery

Charlie Sheen Twitter rant against ex-wife Brooke Mueller: 'Anger Management' actor slams 'Evil Whore' and child/family services in epic social media tirade