Parsing of unquoted string values containing colons

[MagicalTux]

I have to parse a file that contains something similar to the following:

chapters: [00:00:00.000]

When attempting to parse this however I get the following error: ParseError: Partial value found at line 1

I am guessing this is because of the un-quoted : however as far as I can see most other yaml parsers are parsing this fine, so I'm guessing this qualifies as a bug.