QT Linguist Limitation

Hi, I am using QT Linguist V4.7.2. There are two limitations with this application:

(1) It is not able to accept .ts file which has special/symbol characters. I edit the .ts file with WordPad and gvim. Whenever I add any translation string which has special/symbol characters like the "ohm" and "degree"('o' superscript), save it and open it in QT Linguist, it complains malformed .ts file with error message: "Encountered incorrectly encoded content".

(2) QT Linguist does not enable the users to add translation source string. Only the target translated string. If it enables the user to add translation source string, (1) mentioned above would not matter to me.

Please advise how I could overcome this problem. Is there any updated QT linguit that I could use? Thanks!

Regards,
KH