When copy-pasting from konsole, trailing spaces are occasionally transformed into carriage returns. This may lead to data loss if copy-pasting to another konsole in the process of building a command. Example: when intending to do "cp file1 file2 directory", and copy-pasting "file1 file2" from one konsole to another after typing cp, you just lost file2 => such bugs are just inacceptable! It is due to this potential of data loss that I marked the bug as critical. I'm aware that konsole has had trouble with trailing spaces for ages, and had a bad tendency of "fixing" issues by "compensating" them (i.e. replacing a pattern resulting from one bug with the expected pattern, thereby causing a new bug in situations where such patterns were indeed intended) => it is never a good idea to "compensate" like that, and in fixing bugs, care must be taken to actually locate and fix the *cause* rather than patch the symptoms. (In my case, I managed to regenerate the file, but others may not be so lucky...)
I don't really understand what you mean. The only case I can think of is if you have run «cp file1 file2», and then select from «file1» until after «file2», which then includes a carriage return which Konsole copies appropriately. I. e. the "trailing spaces" you talk about are carriage returns.
This bug has had its resolution changed, but accidentally has been left in NEEDSINFO status. I am thus closing this bug and setting the status as RESOLVED to reflect the resolution change.