I didn't notice any problems with connection via either USB or ethernet after upgrading to Beta 11. There are two possible known causes for this, let's rule those out first:

1) There is a known bug in the driver when running under Windows XP. If that is your operating system, then this is a likely scenario.

2) There is a FAQ entry here, titled "Why did ethernet and/or USB quit working after I upgraded the software?". It's not that one, is it?

Let us know if it's either of those. If not, we'll work on it some more.