How can I solve the 7.01.01 bug that makes editing users and roles impossible?

For example, I get this error attempting to edit a user:

Error: is currently unavailable. DotNetNuke.Services.Exceptions.ModuleLoadException: Conversion failed when converting the nvarchar value 'sxlogosmall.png' to data type int. ---> System.Data.SqlClient.SqlException: Conversion failed when converting the nvarchar value 'sxlogosmall.png' to data type int. at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection) at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning() at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) at System.Data.SqlClient.SqlDataReader.HasMoreRows() at System.Data.SqlClient.SqlDataReader.ReadInternal(Boolean setTimeout) at DotNetNuke.Common.Utilities.CBO.FillListFromReader(Type objType, IDataReader dr, IList objList, Boolean closeReader) at DotNetNuke.Common.Utilities.CBO.FillCollection(IDataReader dr, Type objType) at DotNetNuke.Modules.Admin.Users.User.DataBind() at DotNetNuke.Modules.Admin.Users.ManageUsers.BindUser() at DotNetNuke.Modules.Admin.Users.ManageUsers.ShowPanel() at DotNetNuke.Modules.Admin.Users.ManageUsers.BindData() at DotNetNuke.Modules.Admin.Users.ManageUsers.OnLoad(EventArgs e) --- End of inner exception stack trace ---