Installation of extension through MagentoConnect fails

Properties ID: 000010
Filed under:

If you get the following or similar error message:

Failed to download magento-community/UnirgyGiftcert within preferred state "stable", latest release is version 0.9.4, stability "beta", use "channel://" to install
Cannot initialize 'channel://', invalid or missing package file
Install Errors
Package "channel://
Giftcert" is not valid
PEAR ERROR: install failed

Add "-beta" suffix to the extension key for install, like this: