After VirtueMart 1.1.0 had been published at the end of April, we were very surprised and happy of how much downloads it had. The current download stats express that there was a huge need of a working eCommerce solution for Joomla! 1.5. This also explains why the versions for Joomla! 1.5 have a higher number of downloads.
This larger user base for VirtueMart 1.1 also quickly found some issues, which are now being addressed by a maintenance release, which is due for the end of next week (around June, 19th). This will also be the first time, when you can update VirtueMart using the built-in version-updater function.
We will keep you updated once VirtueMart 1.1.1 is available.