We've just made some tweaks to our forums attachment downloading script which we think should successfully trick Pleco's (= Apple's) built-in web browser on iPhone / iPod / iPad into downloading text files from PlecoForums instead of simply displaying them in the browser, so if you've had trouble downloading attachments here before, try again and see if it works better. (FWIW, in the latest version 2.1.2 you can also just tap on the + button at the bottom of the Pleco web browser screen to have an option to save the current page to disk)