Inner tube blows up due to rim holes I've decided to cycle to work and got myself a new bike.

When the bike arrived I inflated the tyres to 80psi (20 below recommended) using a track pump. Instantly the inner tube blew up. I thought the one that came with the bike may have been poor quality. So I inserted a new continental tube and inflated it, and it too blew up.

Then I figured out the problem. The inner side of the rim has holes where spokes connect to the wheel. When I inspect the inner tube it seems to have small bumps on it corresponding to these holes. It seems when I inflate the tube to high pressure it tries to expand into these holes. It is exactly at one of these holes that the tube punctures and leaks. 

I think the the rim should provide a smooth flat surface for the tube. But this is my first bike and I'm not very knowledgable. Is it common for bike rims to have this structure? 

If not, what can I do to fix this problem? I'm thinking of filling up these holes with glue gun.
I figured out a solution. The thing that is supposed to stop the inner tube from expanding into spoke holes is called a rim tape. The tape that came with the bike is really flimsy. I'll purchase and apply a high pressure rim tape. 

Hopefully that would fix the problem.

Update:
I've decided to go for a cotton rim tape as they're more durable than rubber ones. And after installing the tape, hey presto, the problem is gone.