John, I added a maxlength tag to the OtherMonthlyAmount input. I set it to five characters. Not sure that's the right number, especially for Japan. Maybe we need a couple more? It definitely stops this problem.

Thanks so much Randy! It looks like the max donation amount on the JP banners is 1344000 JPY, so maybe we should set the max char count to 7 instead?

@CDenes_WMF are there any other currencies we should consider for the max number of chars allowed in the "Other" input?

I set it to 7

Thanks for the ping, John! Sounds good RE Japan. Regarding other currencies -- Where could I find the max donation amounts per country?

7 seems fine; since this is just a payments wiki MC issue, we're only set up to run post-payment MC in English/6C right now (otherwise MC is in the banner).

Max donation = the local equivalent of $12,000 USD. CO amounts are probably our longest as far as characters, but we aren't set up to run this in CO or JP, only 6C.