Hi,
Concerning the BUGFIX:
labels containing spaces were not encoded before being submitted, so we got a "http://mail... search=cat&cat=my
label&..." instead of "http://mail... search=cat&cat=my%20label&..."
I corrected every other unescaped string in fetch_box(), but left aside the Integers (obvious reason).


Concerning the improvement:
Parsing the http-responses was leaving some characters hard-coded. For details, see
GMailer::Connection.unescapeHTML(string)


For remarks, questions, or details: xcambar at gmail dot com

Here is the diff between gmailer-0.1.5 and gmailer-0.1.5-mod:

$ diff gmailer.rb gmailer_mod.rb
>           #
>           # return String
>           # param string string
>           # desc Unescapes properly Unicode escape characters
>           #
>           def unescapeHTML(string)
>         string.gsub!(/(\\u(.{4}))/n) {
>           match = $1.dup
>           match = match[1..match.length]
>           res=0
>           for i in 0 .. match.reverse!.length-1
>             res+= (match[i..i].hex)* 16**i
>           end
>           res.chr
>         }
>         string.gsub!(/&(.*?);/n) {
>           match = $1.dup
>           case match
>           when /\Aamp\z/ni           then '&'
>           when /\Aquot\z/ni          then '\"'
>           when /\Agt\z/ni            then '>'
>           when /\Alt\z/ni            then '<'
>           when /\A#(\d+)\z/n         then Integer($1).chr
>           when /\A#x([0-9a-f]+)\z/ni then $1.hex.chr
>           end
>         }
>       end
>           
>           
274a305
>                         unescapeHTML(x)
319c350
<                     q = "search=" + box.downcase + "&view=tl&start=" + pos.to_s
---
>                     q = "search=" + URI.escape(box.downcase) + "&view=tl&start=" +
pos.to_s
322c353
<                     q = "search=cat&cat=" + box.to_s + "&view=tl&start=" +
pos.to_s
---
>                     q = "search=cat&cat=" + URI.escape(box.to_s) + "&view=tl&start="
+ pos.to_s
327c358
<                        q += "&th=" + box[0].to_s
---
>                        q += "&th=" + URI.escape(box[0].to_s)
329c360
<                           q += "&msgs=" + box[i].to_s
---
>                           q += "&msgs=" + URI.escape(box[i].to_s)
332c363
<                        q += "&th=" + box.to_s
---
>                        q += "&th=" + URI.escape(box.to_s)
338c369
<                        q += "&th=" + box[0].to_s
---
>                        q += "&th=" + URI.escape(box[0].to_s)
340c371
<                           q += "&msgs=" + box[i].to_s
---
>                           q += "&msgs=" + URI.escape(box[i].to_s)
343c374
<                        q += "&th=" + box.to_s
---
>                        q += "&th=" + URI.escape(box.to_s)
349c380
<                        q += "&th=" + box[0].to_s
---
>                        q += "&th=" + URI.escape(box[0].to_s)
351c382
<                           q += "&msgs=" + box[i].to_s
---
>                           q += "&msgs=" + URI.escape(box[i].to_s)
354c385
<                        q += "&th=" + box.to_s
---
>                        q += "&th=" + URI.escape(box.to_s)
358c389
<                     q = "view=om&th=" + box.to_s
---
>                     q = "view=om&th=" + URI.escape(box.to_s)