Really? Padding was necessary to get the skinsdb updater to work, hence commit f34abaedd2. I believe this should state 5.4.0.

shouldn't `actual_padding == 0` cause none of these checks to be ran?

(same)

```suggestion * Before 5.5.0 this function did not accept padding and returned nil ```

> Omission of padding characters is allowed but how do you handle that?

...yet `isalnum` is locale-dependent.