You sure that is not spam?
Yep, that’s spam. Seeing quite a few of these, with the ‘real’ name and realish email address.
Some member profiles on my site are starting to become garbled …
The way you state the issue, you make it seem as if members’ profiles that were once correct are being changed into a “garbled” set of strings. However, if what you mean is that new registrants profiles appear as garbled strings, then I would assume it is spam as well.
First thing to do is upgrade to the latest WPMU and make sure you are using some form of anti-spam protection–Akismet, captchas, etc. Also, spammers many not be the only unwanted entities targeting your site. If you are not using the latest version of WPMU, then you are greatly exposing your site to attacks from more malicious parties who target older versions of WP, exploiting any recently-announced security issues in older version.
Next, you will want to upgrade BuddyPress to the latest version. Once you’ve done that, you will need to update your theme to work with BuddyPress. you can either do that yourself or contact the designer of your theme to find out if the theme you are using works with BP 1.1.2.
More information about theme changes in BP 1.1.x:
https://codex.buddypress.org/how-to-guides/upgrading-a-buddypress-1-0-theme-for-buddypress-1-1/
