What's wrong with shortcut button function?

[mellody]

When i try to bold some text in quick reply pages, usually what i have to do is block the words that i want to tag bold using Ctrl+B, but why it didn't works?
And when i try to click the button, also didn't work...
In the end, i wrote [ B ][ /B ] manually...

But if i go to advanced reply, it works again...
It's just me or anybody also have the same problems?