Cannot build Chromium with VS2010 CTP

Question

(Note: this is a repost since my first one was in the wrong forum)

I gave a quick try at VS2010 with Chromium.

Download infos at http://dev.chromium.org/, sources at http://src.chromium.org/viewvc/chrome/trunk/src/.

While building v8_base.vcproj, I got the following PDB errors:

Compiling...
unicode.cc
disasm-ia32.cc
zone.cc
variables.cc
v8threads.cc
v8.cc
v8-counters.cc
utils.cc
usage-analyzer.cc
top.cc
token.cc
stub-cache.cc
stub-cache-ia32.cc
string-stream.cc
spaces.cc
snapshot-common.cc
serialize.cc
scopes.cc
scopeinfo.cc
scanner.cc
z:\src\v8\src\unicode.h(59) : error C2471: cannot update program database 'z:\src\chrome\debug\obj\v8_base\vc90.idb'
Generating Code...
Compiling...
runtime.cc
..\..\src\runtime.cc : fatal error C1090: PDB API call failed, error code '23' : '(
rewriter.cc
..\..\src\rewriter.cc : fatal error C1090: PDB API call failed, error code '23' : '(
regexp-stack.cc
..\..\src\regexp-stack.cc : fatal error C1090: PDB API call failed, error code '23' : '(
(every remaining source files continue with this error, the pdb seems corrupted up to this point)

Any thought?

Note: I have built through the shared directory functionality of VPC, if relevant.

M-A