CMS Made Simple Forums

We get the following error when trying to download an excel spreadsheet of our form results in Form Browser:

Error: at line 298 in file /modules/FormBuilder/FormBuilder.module.php:

String could not be parsed as XML

Does this sound like a strange character in someone's submitted form could be causing the error? If so, any suggestions on what to look for? I don't see anything obvious so far in the most recently submitted forms.

I found the culprit by poking around in the database (fb_formbrowser table). One of the submitted forms was abruptly cut off, so the XML format was messed up. I deleted that row, and I can now download the excel file without an error.