From: utzoo!decvax!harpo!duke!dennis
Newsgroups: net.unix-wizards
Title: Re: 11/24 and 11/44 printf problems
Article-I.D.: duke.2676
Posted: Fri Oct 22 09:00:19 1982
Received: Sat Oct 23 01:49:55 1982
References: lime.309

There is an obscure bug in the 11/44 float box which causes
the stexp instruction to misbehave when used with auto-increment or -decrement
addressing modes.  The register is changed by the size of the current
float word instead of by 2.  We reported this error to DEC over
a year ago, and heard that there was a fix out, but never heard anything more.
This might cause at least some of the problem you are seeing.