It seems that Evernote has at least 3 Web UI versions:

• A simple, lightweight, read-only version
• An Ajax version (the one opened by default by MicroB)
• The full Web UI (opened by default on a desktop browser)

Everything was fine with MicroB and the Ajax version until a couple of months ago: I could read notes, create notes and edit notes (if they had RTF, I could only append text though). Now it can't show notes anymore...

I can use MicroB and Firefox to open the full Web version of Evernote, even though it's buggy and very slow - ant that's using Wi-Fi (on my 2G/3G network it is painfully slow).

The Ajax version was very fast on any connection type, but now it doesn't work on either browser.

The simple version works fine on Firefox: it allows you to search, read, e-mail and delete notes - but not edit them. You can also create "quick notes". I can only use the simple version on MicroB when Javascript is turned off (or else it loads the buggy Ajax version).

So, if you just want to read a note on your phone and the connection is slow, you can use the simple mobile Web UI at http://www.evernote.com/m/. For a full editing version, go to the full Web interface (if you connection and patience allows you).