With teletext subtitles, sometimes the spaces between words are missing.
The issue has been mentioned by Erik some time ago in another thread.
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Sometimes many words in a sub get concatenated without whitespace, sometimes part of the first and last character on a (long) are cropped, sometimes a line gets wrapped at an illogical place, the next word is then in dark grey ink, and the rest of the line is okay. I've seen this only on BBC. Looks like some control character is interpreted incorrectly.
It seems to occur when lines with different colours are displayed...