make check of R-alpha_2006-04-08_r37675 fails: qbeta

make check of R-alpha_2006-04-08_r37675 fails on Debian GNU/Linux 3.1 running
on an Intel P4 computer.

version

               _                                      
platform       i686-pc-linux-gnu                      
arch           i686                                   
os             linux-gnu                              
system         i686, linux-gnu                        
status         alpha                                  
major          2                                      
minor          3.0                                    
year           2006                                   
month          04                                     
day            08                                     
svn rev        37675                                  
language       R                                      
version.string Version 2.3.0 alpha (2006-04-08 r37675)

I'm using ATLAS with the SSE2 extensions, and get the same error with ATLAS
3.2.1 (packages atlas2-* 3.2.1ln-15 in Debian) and 3.6.0 (packages atlas3-*
3.6.0-19 in Debian).  I've also tried without external BLAS (--without-blas),
but the error still occurs.

43 (0) $ ./configure
[...]
R is now configured for i686-pc-linux-gnu

  Source directory:          .
  Installation directory:    /usr/local

  C compiler:                gcc  -g -O2 -std=gnu99
  Fortran 77 compiler:       g77  -g -O2

  C++ compiler:              g++  -g -O2
  Fortran 90/95 compiler:    g77 -g -O2

  Interfaces supported:      X11, tcltk
  External libraries:        readline, BLAS(ATLAS)
  Additional capabilities:   PNG, JPEG, iconv, MBCS, NLS
  Options enabled:           R profiling

  Recommended packages:      yes

44 (0) $ make
[...]

45 (0) $ make check
[...]
running code in 'd-p-q-r-tests.R' ... OK
comparing 'd-p-q-r-tests.Rout' to './d-p-q-r-tests.Rout.save' ...777,778d776
< Warning message:
< full precision was not achieved in 'qbeta' 
make[3]: *** [d-p-q-r-tests.Rout] Error 1
[...]

46 (0) $ diff tests/d-p-q-r-tests.Rout.{save,fail}
3c3
< Version 2.3.0 alpha (2006-04-03 r37628)
---

Version 2.3.0 alpha (2006-04-08 r37675)

791a792,793

Warning message:
full precision was not achieved in 'qbeta' 

1073c1075
< Time elapsed:  2.53 0.03 2.55 0 0 
---

Time elapsed:  4.939 0.024 4.967 0 0 

The (hopefully) interesting part of tests/d-p-q-r-tests.Rout.fail:

## Check q*(p* ( log ), log) = identity
All.eq(Rbeta,   qbeta    (log(Pbeta), shape1 = .8, shape2 = 2, log=TRUE))

[1] TRUE
Warning message:
full precision was not achieved in 'qbeta' 

Please let me know if there is more I can provide to help trace this!