DSStats 1.1 - PHP Notice: Uninitialized string offset: 26

[Howie]

I happened to be watching my polller output on the hour just now, and saw a bunch of this go by:

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PHP Notice:  Uninitialized string offset:  26 in /var/www/docs/cacti/plugins/dsstats/functions.php on line 276
PHP Notice:  Uninitialized string offset:  27 in /var/www/docs/cacti/plugins/dsstats/functions.php on line 281
PHP Notice:  Uninitialized string offset:  27 in /var/www/docs/cacti/plugins/dsstats/functions.php on line 282
PHP Notice:  Uninitialized string offset:  28 in /var/www/docs/cacti/plugins/dsstats/functions.php on line 275

and then

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/* assume that an RRDfile has not more than 26 data sources */

which apparently is a problem for some of my data sources

I can't think where I have 28 data sources in a single rrdfile though - is there an easy way to check?