Speaking of currency changes, if Valve really are introducing 12 new currencies this week and converting the existing accounts in those regions to new currencies, there will be quite a few changes that will have to happen in Enhanced Steam to make things work correctly again.
For starters, the "Total Spent" on your account page won't be correct going forward. Currently, this function doesn't capture any currency data on the transactions and just assumes that they're all in the same currency. Since it's very likely they'll keep your existing purchases in USD and only record your new purchases in whatever currency you use, it will throw the figure off significantly after you make a purchase in the new currency. For example, if you have $1,000 USD spent right now, after you purchase an item in CAD (for example), the function may show that you've spent $1,010 CAD, which would be incorrect.
Additionally, some features like the lowest price and price history functions won't show correctly until they're updated. Right now, the data file we get from IsThereAnyDeal sends the currency type, then Enhanced Steam figures out how to format that currency. If it can't figure out how to format the currency, it will show as "$x.xx", when in reality it could be "$x.xx CAD". This will be pretty easy to fix, but since I'm not privy to what the new currencies will be and how they'll be formatted, I can't fix this beforehand.
Another feature that will be affected will be the regional price comparisons. Again, this tries to match the currency type of your store page, and adjusts the other region's prices to that currency. Until it's updated, you may experience an instance where this feature doesn't work at all, or will try to convert everything to compare it to USD.
The market transaction history for users won't be correct until that function is updated. If someone buys an item from you on the market using one of the new currencies, Enhanced Steam won't know how to convert that into your local currency.
Finally, there will be a few small things here and there that may not look right or may not be formatted correctly until Enhanced Steam is updated to handle them. Things like the lowest market prices on the inventory page, average value of Steam trading cards on badge pages, approximate worth of dropped cards, and even things like Steam wallet balance in the header may not work until those functions are updated.
Of course, we'll do the best we can to get things updated as quickly as possible, I just wanted to give you guys a heads up that if your Steam currency is changing soon, expect a few issues with Enhanced Steam along the way. If you're affected by one of these issues, feel free to submit a bug report using the Enhanced Steam menu at the top of every Steam page. Also, browse through the existing bug reports in case someone has already put in the same issue, so that we don't spend all of our time weeding through the duplicates. And finally, thanks for your patience during this process.