SMF breaks up long words by inserting a space every 79 characters (it is a space in a with a negative margin). Example: here are 120 'a' characters:

aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

When copying/pasting the chars, the space is visible at the 80th position, which is very annoying...

Instead, SMF should insert the standardized tag (word break opportunity) already recognized by most browsers. In theory is identical to U+200B (ZERO-WIDTH SPACE) but this is false; for example the current Chrome version on Linux (Version 23.0.1271.97) replaces U+200B with '#' when copying & pasting to a non-UTF8 application, whereas is nicely invisible...