I paste a lot of C code into my posts. After upgrading to 2.5 I found that I cannot do it anymore. There are several problems actually.
First, pressing TAB keyboard button to add indentation no longer works - it moves the cursor somewhere out of editor.
Second, even if I copy/paste the C code from somewhere else with tabulation symbols inside, after saving they're all gone.
Again, this problem occurs in Firefox only. IE 7 handles this.
Third, if adding indentation with space characters, as with tabulation, spaces are gone after saving.
I'll appreciate any help with this issue.