My Sites Have Become "Read Only"

I may be having the same trouble as this http://drupal.org/node/350565

My web sites have become "read-only." Doing ANYTHING at them which should push some info in the database gives only a page refresh, with no feedback.

I upgraded from various versions of 5 to 5.14, things seemed fine, I dumped all the databases as a backup (numerous times along the process).

Some of the sites I updated to 6.8 and ran in a multisite configuration. Those sites seemed to work fine and the upgrades in Drupal 6 were nice. I try to run as lean sites as possible without any additional modules: KISS.

I had two sites with some modules that have not yet been updated for Drupal 6, so I decided to to a multisite config for them. These two Drupal 5 sites never recovered. I feel certain the databases are not corrupt since I can load them in MAMP and they seem fine. But when everything is set up at my host GoDaddy.com, the sites have become "read-only." I can access the sites, read the content, but when I try to log in, the login page merely refreshes.

So after this pain (and days of trying various things to work), I decided to put one of them in to Drupal 6.8.

At first everything seemed fine. I could log in, and change any settings, all my other Drupal 6.8 sites seemed fine too. I logged out of all but one Drupal 6.8 site and went to bed in the wee hours.

Later, when I got up and tried to access my sites, I found ALL of those sites had become "read-only." Logging in just brought a refresh of the page, no feedback.

The one site I am still logged in to, shows no errors in the /admin/reports/status or /admin/reports/dblog. I am running on Apache, php 4.3.11 and mySQL 5.0.67. My php.ini file sets aside 30MB RAM. There are only two modules in my sites/all/modules folder (cck, and views, most recent versions, and I don't think they are turned on since I don't need them at the moment), and no modules in any of the individual sites modules folders.

Even if I go in to phpMyAdmin and to the sessions table, find my IP and set the User ID as 1, it does give me admin access to the web site, but I am stuck with everything being read only. NONE of my changes stick.

I am suspicious that GoDaddy.com has done something, but I don't know what. They inform me they won't troubleshoot scripting issues, but I do not believe this is directly a Drupal issue as I was completely in control of my 6.8 sites, then a few hours later all of them become read only.

My sites are tiny. All my databases are less than 2 MB. Of course all of this just makes me wish I had the servers in my own space where I was in control of all the variables, but...

Why have all my sites become read-only?

(I have emptied the browser cache incessantly, and tried other browsers, and the outcome is the same. I tried the method described on this page and that didn't work either.)

All help appreciated! TIA