[NTG-context] Strange error in using backgrounds with enumerations

[Aditya Mahajan]

On Sun, 13 Jul 2008, Hans Hagen wrote:

> Aditya Mahajan wrote:
>> Hi,
>>
>> I am getting the following error while using backgrounds with enumeration.
>> (Context ver: 2008.07.10 09:58 MKIV,  LuaTeX, Version
>> snapshot-0.28.0-2008070423)
>>
>> The error depends on the frame occuring at a particular location on the
>> page, so the example is not so minimal. The error is
>>
>> ! Missing = inserted for \ifdim.
>> <to be read again>
>>                    p
>> \textbackgroundskip ->-4.5255pt p
>>                                  lus -1.13136pt minus -1.13136pt
>> \dodostoptextbackground ...im \textbackgroundskip
>>                                                  >\zeropoint \kern
>> \scratch...
>> \stoptextbackground ->\dodostoptextbackground
>>                                               \carryoverpar \egroup
>> \@@stopdescription ...scriptionparameter \c!after
>>                                                   \egroup \def
>> \currentdescr...
>> l.352 \stopcorollary
>>
>> ?
>> ! Illegal unit of measure (pt inserted).
>> <to be read again>
>>                    p
>> <to be read again> p
>>                     l
>> \textbackgroundskip ->-4.5255pt pl
>>                                   us -1.13136pt minus -1.13136pt
>> \dodostoptextbackground ...im \textbackgroundskip
>>                                                  >\zeropoint \kern
>> \scratch...
>> \stoptextbackground ->\dodostoptextbackground
>>                                               \carryoverpar \egroup
>> \@@stopdescription ...scriptionparameter \c!after
>>                                                   \egroup \def
>> \currentdescr...
>> l.352 \stopcorollary
>
> also in mkii, i'll check it
>
>> I do not know if it is an error in my setup, or some bug in context. I
>> cannot check it on garden, since live is broken at the moment.
>
> btw, you can omit the {} in $Δ_T$

The text is a mixture of old writeup (with mkii) and new writeup. I am 
getting into the habit of not adding {} before utf chars.

Aditya