R GUI with different version of R

I have multiple versions of R installed.

The default is set with RSwitch to 2.9.  This is what runs from a shell.

If I start the R.app gui which is from 2.10 I get a crash:

Type 'q()' to quit R.

Error in strsplit(x[ok], "[.-]") : 
 5 arguments passed to .Internal(strsplit) which requires 6
Error in strsplit(msg, "\n") : 
 5 arguments passed to .Internal(strsplit) which requires 6
Error in strsplit(x[ok], "[.-]") : 
 5 arguments passed to .Internal(strsplit) which requires 6

*** caught segfault ***
address 0xc000000c, cause 'memory not mapped'

Possible actions:
1: abort (with core dump, if enabled)
2: normal R exit

As I understood the FAQ this should have worked.

 Is it possible to use a current R gui with older frameworks?

No -- see FAQ 12.15:

"The advanatage of this setup is that it is possible to install multiple R versions in parallel and they all will be fully functional as long as the Current symbolic link points to the currently used version."

Note the last part of the sentence.

Is it possible to use a current R gui with older frameworks?

No, the GUI embeds R so a given binary works only with a very specific version of R. You can *compile* the GUI for any R version but the binary will be tied to a specific R version.