this has happened to me a couple of times. when i open up a scratch project, or finish saving or making a costume, all the text disappears. it is all registered as still there, and i can fix it simply by saving, editing a costume that contains text and then re-opening scratch. but it has happened to my project HIVE three times and it is incredibly annoying.
it makes ALL text disappear. even the buttons on the scratch program itself, and variables and words in the script.
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You've hit the "Disappearing text" bug! It's a common bug that's been in Scratch since 1.3, and no one knows why it happens and where to fix it.
There's a sticky about it, explaining what to do to recover your text. (link)
And there's a topic where people can say what they were doing at the time, and look at the different reports to find a connection. (link)
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