Running cppcheck 1.34 (http://cppcheck.wiki.sourceforge.net/) against svn trunk Kdiff3@96 yields:
[src-QT4/fileaccess.cpp:1053]: (error) Mismatching allocation and deallocation: buf
delete buf; should be delete[] buf;
Patch, though I doubt you need it :P
Patch, though I doubt you need it :P