yes it is the problem with appslib mine was doing exactly the same yesterday.
By following the advice from another post, I was able to install Gmail and Market and it works absolutely perfectly. Here is the info from the post that I followed:
"To get the android market, GMail etc. do the following. Download this file to Set up Google Apps:http://dc424.4shared.com/download/ZiEDe
the following comes from Arctablet.com
Extract the files, transfer the files and then install the apks using file manager in this order:
-1.Google Services Framework -2.OneTime Initializer -3.Setup Wizard -4.Talk -5.Gmail -6.Vending
1) After installing all the G Market files go try to login to Gmail. You will get an error.
2) Now go into settings and manage apps. Click on Google framework. Clear the cache files.
3) Do the same thing for Gmail and clear the cache.
4) Power down and back up.
5) DONT launch the market but launch Gmail and login. It should work.
6) Now you can launch the Market.
Only Change was that i have no "cached files" for "Gmail and Google framework" to delete.
So i have deleted the "data files" itselfÔÇª
This worked for me. Gmail works, The Market works. it an older version of the Market, but it works."
What I had to do was to download the file from the link above to my computer and because it is a .rar file I had to download the free version of WinZip to extract the files. Once extracted, I copied them to the Download Directory on my Arnova by connecting it to my computer via usb and using Windows Explorer. Once copied, you can install the files on the Arnova by using its Files program.
I now have Netflix, Gmail, Nook, Market and other apps working very well on the Arnova. Seems like it was a good purchase except for their lousy customer service. Hope this helps.
which I found on another thread here. And now mine is working perfectly.