A patch was released to upgrade from 2.5.x to 2.5.4. The change log is below. You can get this patch at
www.blesta.com/download/
Code:
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v. 2.5.4 May 24, 2012
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Bug Fixes:
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-Fixed an minor SSL warning caused by the Google Checkout non-merchant gateway
where the checkout button was using HTTP rather than HTTPS.
-Fixed issue with detecting decimal formatting values in format_currency() that
caused values in floating point format to be formatted incorrectly if their
currency used a non-decimal point format.