Hi Dave,
Browser uses your Locale setting, so for any column or field that is of type 'Numeric' will use the locale setting and print it with commas.
Only way you can get rid of it w/out modifying any other settings is to use a calculated field in the display of type 'String' and Send to Web again. Let me know if this works for you.
Regards,
Shoaib.
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Thanks,
Shoaib