Same here. And just as odd, I can copy the tilde out of your post and paste it into the credit roll media generator, but upon closing it gets converted to a double quote.
1) Programs->accessories->system tools-character map
2) Select Arial & scroll down til you find U+0334 "Combining Tilde Overlay" - that's way past the first/normal tilde for Arial.
3) Select & Copy
4) Back to the Credit Roll & Paste.