Your comments

Http auth is always unencrypted. If you use https it is encrypted.
Textastic will remember the last remote preview url you entered for each file.
You can add the user name and password to the url like that: http://user:password@example.com/
You can add the user name and password to the url like that: http://user:password@example.com/
I think I found the bug - it was in the code that caches highlighted lines and only occured in files with more than 500 lines. 

It will be fixed in the next update.
Hello,


I assume you mean iDisk. According to another user it helped to enter the user name without "@me.com".


See http://feedback.textasticapp.com/feedback/38359-mobileme-http-status-402

Does that solve the issue?