Segfault at install

[remyy]

Hello,

I run a fresh debian 64 guest in a virtualbox on seven 64 bits.

When i try to install a amd64 1.8.2.5 or 1.8.3.3 or 1.8.3.4 i got a "Unterminated quoted string" quiclky after hitting the enter key.
When i try to install a x32 1.8.2.5 or 1.8.3.4 i got a segfault in libpthread.

Any idea ?

The debian is for emulating a server, the seven for showing a egroupware dev to a customer.

Thanks in advance from Toulouse, France.
Rémy.