Hmm, isn't so much as a bug, but interesting none the less:
http://www.google.nl/search?q=H%CC%B6e%CD%9C%CC%B8%D2%89

http://img18.imageshack.us/img18/2944/screenshot20110921at848.png

The Matrix Google Style :-)

But its kinda interesting how the browser has *a lot* of trouble handling these kind of characters (try copying it to a textarea):

H̶e̸͜҉Z̴̷͇̞͎̖͙̫͕̦̗͎̙͍̯͐̓̈́̊͘͘͟A̛͇̠̦̮̖͍͚̟͕̜ͩͪ̅ͪ̒̂̇̎̉͐̃̌̚̕L̷̡̛̠̩͍͓̰̲̩̭͓̒̿̌ͬͬͩ͂̎̑́̓ͪͨ́͜Ǵ̛̈͗̇҉̛̛͕̞̫̯͔̱̪̦͔̭̕ͅO̖͚̩͓̣̲̯̭̱ͨ̆͊ͦ͆

And I wonder what will happen once I submit it. I wonder what kind of weird stuff you could do with these characters :P

Btw, even more interestingly Bing can't handle these characters (#1) and two it gives a suggestion whether I meant something else, yet isn't able to find anything for the suggestion either (#2) :P

http://www.bing.com/search?q=H̶e̸͜҉

http://i.imgur.com/3DbjO.png