I'm not sure if this is only a bug in 1.3b10 or it also exists in other
betas. Actually, I'm not sure if it's a bug at all.
Anyhow, the PPTP user key length is limited to 63 characters. I mean,
according to the HTML code, it's unlimited:
<input name="password" type="password" class="formfld" id="password"
I don't know how big the actual key length should be, but in the past, I've
been able to use 64 characters and it has worked conneccting from a Windows
environment. Has something changed? perhaps there's a character that was