I agree with @FutureSecurity here. Some times compressed data sizes may leak information about the plaintext, so you must be a bit careful.
That said, *uncompressed* data may leak information as well. Basically you should always remind yourself that the ciphertext size says something about the plaintext size.
When I want to remove an unrelated tag from a question, I faced a problem; The system doesn't allow to save me because I didn't modify the text. Adding, however, a tag doesn't require to touch the text. There is nothing I want to change, all I want is remove the tag.
There is a way to overcome ...
