Hi Allen, I'm a little confused by this:
"And when i try to search for new plugins and update existing ones i get this one:"
So are you saying that you cannot search for any new plugins or update existing ones without getting an error, if our plugin is activated? And when it IS activated, there's a persistent error at the top of your admin panel?
If that's the case, then deactivate and delete our whole plugin folder entirely from your /plugins folder (i prefer FTP), and then try to install a new version.
If the problem persists, then there must be some conflict with some other plugin on your site, and a methodical disabling / enabling of the others would be necessary to track it down.
If you can do the legwork to determine which plugin we may be in conflict with, we'll take a look and see if it should be fixed on our end....
Typically, I think it's the responsibility of the less popular of two conflicting plugins to ensure compatibility - for example, if we conflict with a popular plugin with half a million downloads, and we have only 50,000 users, then it's on us.
Please post back here further, and I'll also ask Heather (dzynit) to chime in in case she has any ideas...