Bug with Dev site and Bug in ckeditor

Here to report two bugs.

Firstly, the registration page at https://dev.ckeditor.com/register is broken. Although email is listed as an optional field, I get an error that I must enter a valid email address when I leave the field blank. When I do attempt to enter my email address I find that the site does not recognize it as a valid email address. I imagine this is because of the apostrophe in my email address, which is a valid character in the local part of an email address. Please fix this.

Secondly, (the reason I attempted to register an account on the dev site) there is currently a bug in CKEditor, which can be viewed on the demo page, where bolding, italicizing, or underlining text in a pre block where the closing tag immediately follows a new line character causes IE to shift the selection over by one character and bold the new selection.

Example Source:
<pre>
The quick brown fox jumped over the dog.
</pre>

If a user then uses CKEditor in an attempt to make "quick " bold while using IE, the selection shifts over and "uick b" is bolded instead. This problem does not exist in firefox or chrome. Also the problem goes away when the source has "</pre>" immediately following the preiod, or with a space before "</pre>" after the newline.

Note: the problem I have described may affect other buttons as well, but I have only tested with bolding, italicizing, and underlining.

P.S. This bug was discovered while testing with IE 8. I am uncertain which (if any) other version of IE are affected.